A Clinical Trial of an Quadrivalent Inactivated Influenza Vaccine in Healthy Children Aged 6 to 35 Months

Summary

In this single-center, randomized, blinded, positive-controlled design, the investigators will assess the safety and immunogenicity of 2 doses of an inactivated quadrivalent influenza vaccine in children aged 6 to 35 months.

About 120 healthy participants are planned to be enrolled, of who 60 participants were enrolled in the low-dose group and 60 participants were enrolled in the high-dose group. In the low-dose group, participants were randomly (2:1:1) assigned to receive a quadrivalent inactivated influenza vaccine (IIV4) at 0.25 mL including A/H1N1, A/H3N2, B/Victoria, and B/Yamagata, and a trivalent inactivated influenza vaccine (IIV3) at 0.25 mL including A/H1N1, A/H3N2 and B/Victoria, and IIV3 at 0.25 mL including A/H1N1, A/H3N2, and B/Yamagata. In the high-dose group, participants were randomly (2:1:1) assigned to receive IIV4 at 0.5 mL, and IIV3 at 0.25 mL including A/H1N1, A/H3N2, and B/Victoria, and IV3 at 0.25 mL including A/H1N1, A/H3N2, and B/Yamagata. Subjects receive 2 doses of influenza vaccine 4 weeks apart.

The occurrence of adverse reactions within 30 minutes, the occurrence of adverse reactions within 28 days, and serious adverse events within 6 months after vaccination will be observed in all participants. For participants aged 24-35 months in each dose group, laboratory safety tests were measured before enrollment and on day 4 post each dose to assess any toxic effects. In addition, all subjects will be required to collect blood for HI antibody testing before the first dose of vaccination and 30 days after the second dose of vaccination.

Conditions

• Influenza

Interventions

BIOLOGICAL

quadrivalent influenza split vaccine

This vaccine is produced by Changchun Sponsor Institute of Biological Products Co., Ltd. Subjects will receive two doses of quadrivalent influenza vaccine administered 4 weeks apart by intramuscular injection

BIOLOGICAL

quadrivalent influenza split vaccine

This vaccine is produced by Changchun Sponsor Institute of Biological Products Co., Ltd. Subjects will receive two doses of quadrivalent influenza vaccine administered 4 weeks apart by intramuscular injection

BIOLOGICAL

Influenza virus split vaccine

This vaccine is produced by Changchun Sponsor Institute of Biological Products Co., Ltd. Subjects will receive two doses of quadrivalent influenza vaccine administered 4 weeks apart by intramuscular injection

BIOLOGICAL

Influenza virus split vaccine

This vaccine is produced by Changchun Sponsor Institute of Biological Products Co., Ltd. Subjects will receive two doses of quadrivalent influenza vaccine administered 4 weeks apart by intramuscular injection.

Sponsors & Collaborators

• Changchun Institute of Biological Products Co., Ltd.

  collaborator INDUSTRY

• Jiangsu Province Centers for Disease Control and Prevention

  lead NETWORK

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

QUADRUPLE

Model

PARALLEL

Eligibility

Min Age

6 Months

Max Age

35 Months

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2021-10-26

Primary Completion

2022-01-17

Completion

2022-06-16

Countries

• China

Study Locations