This study looks at how many healthcare workers at CHSD hospital developed antibodiesagainst COVID-19 after the second and third waves of the pandemic and after receiving avaccine. It aims to better understand who might still be at risk of infection, how longimmunity lasts after getting COVID or the vaccine, and how reliable previous antibodytests were. Blood samples will be collected from volunteer hospital staff during aone-month period to measure their antibody levels and compare them to earlier results.
Not Provided
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
France
Saint-Denis, France
Not Provided