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COVID-19 Antibody and Reinfection Study

NCT05365750 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 4235

Last updated 2025-09-18

Study results available
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Summary

The goal of this study is to establish a cohort of Kaiser Permanente Colorado (KPCO) members who have and have not had COVID-19 infection for serial antibody testing and PCR testing to:

1. Quantify antibody titers among participants over 9 months.
2. Determine the rates of asymptomatic, mild, and severe recurrent infection among participants with prior COVID-19.
3. Examine association between antibody titer levels and risk of recurrent infection using a case control analysis nested in the cohort.

Conditions

  • COVID-19 Testing

Sponsors & Collaborators

  • Kaiser Permanente

    lead OTHER

Principal Investigators

  • Ingrid Binswanger, MD, MPH, MS · Kaiser Permanente

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2020-06-15
Primary Completion
2023-03-30
Completion
2024-12-31

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05365750 on ClinicalTrials.gov