COVID-19 Study of the Serological Response Against the Severe Acute Respiratory Syndrome (SARS) Coronavirus 2 (CoV-2) Virus in 2 Types of Employees, Hospital and Non-hospital, at Institute Curie and Institute Pasteur

"A nurse will take blood samples under safe conditions compatible with the pandemic period and while respecting the protection of the volunteer's personal data.~The blood samples will be taken at 4 times for Institute Curie and Institute Pasteur: T0, between 6 weeks and 3 months ,6 months and 12 months post-inclusion.~For volunteers already included at Institute Curie : in case of proved (RT-PCR+ or antigenic +) or very likely (anosmia and/or ageusia, and/or digestive syndrome with associated respiratory signs) between 2 sampling times already planned in the flow chart, blood samples shall be performed, if time since last planned sampling(s) has been more than 3 weeks or if time until next sampling(s) is more than 3 weeks.~The serum samples will be extracted and collected prospectively from the blood samples.~For each blood sample, a sample number will be assigned by the laboratory management system of the Department of Biology at Institut Curie."

"The nasopharyngeal swabs will be performed between 6 weeks and 3 months, 6 months and 12 months post-inclusion for Institute Curie staff with at least one of the following criteria: have had RT-PCR+, and/or presence of antibodies at the 95% threshold, and/or anosmia/ageusia, and/or digestive syndrome with associated respiratory signs.~The nasopharyngeal swab shall also be proposed to volunteers not meeting the above listed criteria to have a control group (about 100 volunteers).~For volunteers already included at Institute Curie : in case of proved (RT-PCR+ or antigenic +) or very likely (anosmia and/or ageusia, and/or digestive syndrome with associated respiratory signs) infection between 2 sampling times, nasopharyngeal swabs shall be performed if time since last planned sampling(s) has been more than 3 weeks or if time until next sampling(s) is more than 3 weeks.~The nasopharyngeal swabs will be performed at T0 for Institute Pasteur staff so 4 times in total."