Trial Outcomes & Findings for Safety of Simultaneous mRNA COVID-19 Vaccine With Other Childhood Vaccines in Young Children (NCT NCT06038617)

NCT ID: NCT06038617

Last Updated: 2026-05-13

Results Overview

Number of children with fever (temperature ≥ 38.0°C or ≥ 100.4°F) on day 1 and/or day 2 following Visit 1 and/or Visit 2.

Recruitment status

COMPLETED

Study phase

PHASE4

Target enrollment

347 participants

Primary outcome timeframe

2 Days Post-Administration

Results posted on

2026-05-13

Participant Flow

Participant milestones

Participant milestones
Measure
Simultaneous Vaccination Arm
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Overall Study
STARTED
176
171
Overall Study
COMPLETED
174
168
Overall Study
NOT COMPLETED
2
3

Reasons for withdrawal

Reasons for withdrawal
Measure
Simultaneous Vaccination Arm
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Overall Study
Adverse Event
0
1
Overall Study
Protocol Violation
2
1
Overall Study
Withdrawal by Subject
0
1

Baseline Characteristics

Safety of Simultaneous mRNA COVID-19 Vaccine With Other Childhood Vaccines in Young Children

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Simultaneous Vaccination Arm
n=174 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=168 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Total
n=342 Participants
Total of all reporting groups
Age, Continuous
12.5 months
n=1512 Participants
12.5 months
n=504 Participants
12.5 months
n=2016 Participants
Sex: Female, Male
Female
77 Participants
n=1512 Participants
80 Participants
n=504 Participants
157 Participants
n=2016 Participants
Sex: Female, Male
Male
97 Participants
n=1512 Participants
88 Participants
n=504 Participants
185 Participants
n=2016 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
55 Participants
n=1512 Participants
49 Participants
n=504 Participants
104 Participants
n=2016 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
118 Participants
n=1512 Participants
118 Participants
n=504 Participants
236 Participants
n=2016 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
1 Participants
n=1512 Participants
1 Participants
n=504 Participants
2 Participants
n=2016 Participants
Race/Ethnicity, Customized
White
95 Participants
n=1512 Participants
83 Participants
n=504 Participants
178 Participants
n=2016 Participants
Race/Ethnicity, Customized
Black or African American
18 Participants
n=1512 Participants
23 Participants
n=504 Participants
41 Participants
n=2016 Participants
Race/Ethnicity, Customized
Other
28 Participants
n=1512 Participants
32 Participants
n=504 Participants
60 Participants
n=2016 Participants
Race/Ethnicity, Customized
2 or More Races
28 Participants
n=1512 Participants
26 Participants
n=504 Participants
54 Participants
n=2016 Participants
Race/Ethnicity, Customized
Unknown
5 Participants
n=1512 Participants
4 Participants
n=504 Participants
9 Participants
n=2016 Participants

PRIMARY outcome

Timeframe: 2 Days Post-Administration

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with fever (temperature ≥ 38.0°C or ≥ 100.4°F) on day 1 and/or day 2 following Visit 1 and/or Visit 2.

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=169 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=166 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Fever Following Vaccination
14 Participants
10 Participants

SECONDARY outcome

Timeframe: 2 Days Post Visit 1

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with fever (temperature ≥ 38.0°C or ≥ 100.4°F) on day 1 and/or day 2 following Visit 1

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=169 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=165 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Fever Following Visit 1
13 Participants
4 Participants

SECONDARY outcome

Timeframe: 2 Days Post Visit 2

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with fever (temperature ≥ 38.0°C or ≥ 100.4°F) on day 1 and/or day 2 following Visit 2

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=162 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=155 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Fever Following Visit 2
1 Participants
6 Participants

SECONDARY outcome

Timeframe: 2 Days Post Administration

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with moderate/severe fever (Grade 2 and/or 3) on day 1 and/or day 2 following Visit 1 and Visit 2 combined. (Moderate/severe fever: ≥ 38.4°C or ≥ 101.2°F)

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=169 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=166 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Grade 2 and/or 3 Fever Following Visit 1 and Visit 2 Combined
6 Participants
3 Participants

SECONDARY outcome

Timeframe: 2 Days Post Visit 1

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with moderate/severe fever (Grade 2 and/or 3) on day 1 and/or day 2 following Visit 1. (Moderate/severe fever: ≥ 38.4°C or ≥ 101.2°F)

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=169 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=165 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Grade 2 and/or 3 Fever Following Visit 1
5 Participants
0 Participants

SECONDARY outcome

Timeframe: 2 Days Post Visit 2

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with moderate/severe fever (Grade 2 and/or 3) on day 1 and/or day 2 following Visit 2. (Moderate/severe fever: ≥ 38.4°C or ≥ 101.2°F)

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=162 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=155 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Grade 2 and/or 3 Fever Following Visit 2
1 Participants
3 Participants

SECONDARY outcome

Timeframe: 2 Days Post Administration

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with medical care utilization (medical advice (telephone, patient portal), urgent care visit, emergency department visit, and hospital admission) for fever on day 1 and /or day 2 following Visit 1 and Visit 2 combined.

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=174 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=168 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Medical Care Utilization for Fever - Visit 1 and Visit 2 Combined
0 Participants
0 Participants

SECONDARY outcome

Timeframe: 2 Days Post Visit 1

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with medical care utilization (medical advice (telephone, patient portal),urgent care visit, emergency department visit, and hospital admission) for fever on day 1 and/or day 2 following Visit 1.

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=174 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=168 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Medical Care Utilization for Fever - Visit 1
0 Participants
0 Participants

SECONDARY outcome

Timeframe: 2 Days Post Visit 2

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children with medical care utilization (medical advice (telephone, patient portal),urgent care visit, emergency department visit, and hospital admission) for fever on day 1 and/or day 2 following Visit 2.

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=174 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=168 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Medical Care Utilization for Fever- Visit 2
0 Participants
0 Participants

SECONDARY outcome

Timeframe: 2 Days Post Administration

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children who received antipyretics on day 1 and/or day 2 following Visit 1 and Visit 2 combined.

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=174 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=168 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants Who Received Antipyretics - Visit 1 and Visit 2 Combined
24 Participants
19 Participants

SECONDARY outcome

Timeframe: 2 Days Post Visit 1

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children who received antipyretics on day 1 and/or day 2 following Visit 1.

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=169 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=165 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants Who Received Antipyretics - Visit 1
21 Participants
10 Participants

SECONDARY outcome

Timeframe: 2 Days Post Visit 2

Population: Modified Intent-to-Treat (mITT) Population: Any participant with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Number of children who received antipyretics on day 1 and/or day 2 following Visit 2.

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=162 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=155 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants Who Received Antipyretics - Visit 2
4 Participants
12 Participants

SECONDARY outcome

Timeframe: Up to 7 Days Post Visit 1

Population: Modified Intent-to-Treat (mITT) Population: Any participant age 6-23 months with data collected who was enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Tables summarizing each solicited local and systemic reactogenicity event by maximum classification (none, mild, moderate, and severe), as well as by moderate or severe

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=127 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=125 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Fever · None
117 Participants
118 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Fever · Mild
6 Participants
6 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Fever · Moderate
2 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Fever · Severe
2 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Fussiness · None
39 Participants
37 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Fussiness · Mild
55 Participants
42 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Fussiness · Moderate
33 Participants
44 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Fussiness · Severe
0 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Change in Eating Habits · None
86 Participants
82 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Change in Eating Habits · Mild
34 Participants
33 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Change in Eating Habits · Moderate
7 Participants
10 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Change in Eating Habits · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Drowsiness · None
60 Participants
58 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Drowsiness · Mild
56 Participants
54 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Drowsiness · Moderate
11 Participants
11 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Drowsiness · Severe
0 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Vomiting · None
108 Participants
111 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Vomiting · Mild
19 Participants
13 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Vomiting · Moderate
0 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Vomiting · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Diarrhea · None
98 Participants
105 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Diarrhea · Mild
27 Participants
18 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Diarrhea · Moderate
2 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 6-23 Months Old
Diarrhea · Severe
0 Participants
0 Participants

SECONDARY outcome

Timeframe: Up to 7 Days Post Visit 2

Population: Modified Intent-to-Treat (mITT) Population: Any participant age 6-23 months enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Tables summarizing each solicited local and systemic reactogenicity event by maximum classification (none, mild, moderate, and severe), as well as by moderate or severe

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=123 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=118 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Fever · None
122 Participants
114 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Fever · Mild
1 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Fever · Moderate
0 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Fever · Severe
0 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Fussiness · None
72 Participants
43 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Fussiness · Mild
35 Participants
48 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Fussiness · Moderate
14 Participants
25 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Fussiness · Severe
2 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Change in Eating Habits · None
107 Participants
84 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Change in Eating Habits · Mild
14 Participants
26 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Change in Eating Habits · Moderate
2 Participants
8 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Change in Eating Habits · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Drowsiness · None
102 Participants
69 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Drowsiness · Mild
19 Participants
43 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Drowsiness · Moderate
2 Participants
6 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Drowsiness · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Vomiting · None
110 Participants
104 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Vomiting · Mild
11 Participants
12 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Vomiting · Moderate
2 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Vomiting · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Diarrhea · None
107 Participants
98 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Diarrhea · Mild
12 Participants
18 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Diarrhea · Moderate
3 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 6-23 Months Old
Diarrhea · Severe
1 Participants
0 Participants

SECONDARY outcome

Timeframe: Up to 7 Days Post Visit 1

Population: Modified Intent-to-Treat (mITT) Population: Any participant age 2-5 years old enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Tables summarizing each solicited local and systemic reactogenicity event by maximum classification (none, mild, moderate, and severe), as well as by moderate or severe

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=43 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=40 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Fever · None
40 Participants
38 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Fever · Mild
2 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Fever · Moderate
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Fever · Severe
1 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Fatigue · None
30 Participants
28 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Fatigue · Mild
9 Participants
7 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Fatigue · Moderate
4 Participants
5 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Fatigue · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Headache · None
39 Participants
34 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Headache · Mild
3 Participants
5 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Headache · Moderate
1 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Headache · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Chills · None
40 Participants
36 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Chills · Mild
3 Participants
3 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Chills · Moderate
0 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Chills · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Vomiting · None
40 Participants
38 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Vomiting · Mild
3 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Vomiting · Moderate
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Vomiting · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Diarrhea · None
31 Participants
38 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Diarrhea · Mild
12 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Diarrhea · Moderate
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
Diarrhea · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
New or Worsened Muscle Pain · None
25 Participants
30 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
New or Worsened Muscle Pain · Mild
9 Participants
7 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
New or Worsened Muscle Pain · Moderate
8 Participants
3 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
New or Worsened Muscle Pain · Severe
1 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
New or Worsened Joint Pain · None
40 Participants
36 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
New or Worsened Joint Pain · Mild
1 Participants
3 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
New or Worsened Joint Pain · Moderate
2 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 1, Ages 2-5 Years Old
New or Worsened Joint Pain · Severe
0 Participants
0 Participants

SECONDARY outcome

Timeframe: Up to 7 Days Post Visit 2

Population: Modified Intent-to-Treat (mITT) Population: Any participant age 2-5 years old enrolled and randomized into the study, and received at least one study vaccine at Visit 1.

Tables summarizing each solicited local and systemic reactogenicity event by maximum classification (none, mild, moderate, and severe), as well as by moderate or severe

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=39 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=37 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Fever · None
38 Participants
32 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Fever · Mild
0 Participants
3 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Fever · Moderate
1 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Fever · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Fatigue · None
33 Participants
25 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Fatigue · Mild
4 Participants
7 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Fatigue · Moderate
2 Participants
5 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Fatigue · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Headache · None
34 Participants
32 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Headache · Mild
5 Participants
3 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Headache · Moderate
0 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Headache · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Chills · None
36 Participants
34 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Chills · Mild
3 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Chills · Moderate
0 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Chills · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Vomiting · None
36 Participants
35 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Vomiting · Mild
3 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Vomiting · Moderate
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Vomiting · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Diarrhea · None
34 Participants
32 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Diarrhea · Mild
5 Participants
5 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Diarrhea · Moderate
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
Diarrhea · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
New or Worsened Muscle Pain · None
38 Participants
30 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
New or Worsened Muscle Pain · Mild
1 Participants
5 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
New or Worsened Muscle Pain · Moderate
0 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
New or Worsened Muscle Pain · Severe
0 Participants
0 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
New or Worsened Joint Pain · None
38 Participants
34 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
New or Worsened Joint Pain · Mild
1 Participants
2 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
New or Worsened Joint Pain · Moderate
0 Participants
1 Participants
Number of Participants With Defined Systemic Reactogenicity Events at Visit 2, Ages 2-5 Years Old
New or Worsened Joint Pain · Severe
0 Participants
0 Participants

SECONDARY outcome

Timeframe: Up to 105 Days Post Administration

Population: Modified Intent-to-Treat (mITT) Population: Any participant enrolled and randomized into the study and received at least one study vaccine at Visit 1.

Outcome measures

Outcome measures
Measure
Simultaneous Vaccination Arm
n=174 Participants
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=168 Participants
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
The Number of Individuals With At Least One Serious Adverse Event
Croup
0 Participants
1 Participants
The Number of Individuals With At Least One Serious Adverse Event
Anaphylaxis
1 Participants
0 Participants
The Number of Individuals With At Least One Serious Adverse Event
Viral Infection
1 Participants
0 Participants

Adverse Events

Simultaneous Vaccination Arm

Serious events: 2 serious events
Other events: 0 other events
Deaths: 0 deaths

Sequential Vaccination Arm

Serious events: 1 serious events
Other events: 9 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Simultaneous Vaccination Arm
n=174 participants at risk
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=168 participants at risk
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Respiratory, thoracic and mediastinal disorders
Croup
0.00%
0/174 • Adverse events were collected for 7 days after each vaccination visit. Serious adverse events (SAEs) and adverse events of special interest (AESIs) were collected through the entire study period (up to 105 days).
0.60%
1/168 • Number of events 1 • Adverse events were collected for 7 days after each vaccination visit. Serious adverse events (SAEs) and adverse events of special interest (AESIs) were collected through the entire study period (up to 105 days).
Immune system disorders
Anaphylaxis
0.57%
1/174 • Number of events 1 • Adverse events were collected for 7 days after each vaccination visit. Serious adverse events (SAEs) and adverse events of special interest (AESIs) were collected through the entire study period (up to 105 days).
0.00%
0/168 • Adverse events were collected for 7 days after each vaccination visit. Serious adverse events (SAEs) and adverse events of special interest (AESIs) were collected through the entire study period (up to 105 days).
General disorders
Viral Infection
0.57%
1/174 • Number of events 1 • Adverse events were collected for 7 days after each vaccination visit. Serious adverse events (SAEs) and adverse events of special interest (AESIs) were collected through the entire study period (up to 105 days).
0.00%
0/168 • Adverse events were collected for 7 days after each vaccination visit. Serious adverse events (SAEs) and adverse events of special interest (AESIs) were collected through the entire study period (up to 105 days).

Other adverse events

Other adverse events
Measure
Simultaneous Vaccination Arm
n=174 participants at risk
The simultaneous vaccination group will receive routine childhood vaccinations and mRNA COVID-19 vaccination at Visit 1, followed by a health education visit without vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Sequential Vaccination Arm
n=168 participants at risk
The sequential vaccination group will receive routine childhood vaccinations at Visit 1, followed by a health education visit with mRNA COVID-19 vaccination at Visit 2. mRNA COVID-19 Vaccine: ACIP Recommended Vaccine Routine Childhood Vaccinations: ACIP Recommended Vaccines
Respiratory, thoracic and mediastinal disorders
Rhinorrhea
0.00%
0/174 • Adverse events were collected for 7 days after each vaccination visit. Serious adverse events (SAEs) and adverse events of special interest (AESIs) were collected through the entire study period (up to 105 days).
5.4%
9/168 • Number of events 10 • Adverse events were collected for 7 days after each vaccination visit. Serious adverse events (SAEs) and adverse events of special interest (AESIs) were collected through the entire study period (up to 105 days).

Additional Information

Dr. Michael J. Smith

Duke University

Phone: 919 684 6335

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place