COVID-19 Serologies Among Healthcare Workers at CHSD (SERO2)

Completed

• Conditions: COVID-19; COVID-19 Serological Testing; COVID-19 Vaccines; Health Personnel; Antibodies, Viral; Seroepidemiologic Studies

• Registration Number: NCT06989307
• Lead Sponsor: Centre Hospitalier de Saint-Denis

Brief Summary

This study looks at how many healthcare workers at CHSD hospital developed antibodies against COVID-19 after the second and third waves of the pandemic and after receiving a vaccine. It aims to better understand who might still be at risk of infection, how long immunity lasts after getting COVID or the vaccine, and how reliable previous antibody tests were. Blood samples will be collected from volunteer hospital staff during a one-month period to measure their antibody levels and compare them to earlier results.

Detailed Description

Not available

Study Timeline

• Study Start: 2021-03-01
• Primary Completion: 2021-06-01
• Study Completion: 2021-06-01
• Status Verified: 2025-05
• Study First Submitted: 2025-05-22
• Study First Submitted QC: 2025-05-22
• Last Update Submitted: 2025-05-22
• Study First Posted: 2025-05-25
• Last Update Posted: 2025-05-25

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 447

Inclusion Criteria

• Volunteers from the hospital staff who have signed a new informed consent form

Exclusion Criteria

• Refusal to participate (no signed consent form)
• Staff unavailable during the blood sampling period
• Participation only in the first seroprevalence survey without consent for the second

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
SARS-CoV-2 antibody prevalence (seroprevalence) among healthcare workers at CHSD	1 month (during the serological testing period)

Trial Locations

Locations (1)

France; 🇫🇷 Saint-Denis, France