SERUR: COVID-19 Serological Survey of Staff From the University Reims-Champagne Ardennes

"Diagnostic Test: Anti-SARS-CoV2 Serology A blood sample is collected by venipuncture at Day 0. The anti-SARS-CoV2 serological status is measured by with fully automated MAGLUMI 2019-nCoV IgG and IgM chemiluminescence immunoassays (EUROBIO®)~Other: Questionnaire~Data concerning personal exposure factors are collected in a questionnaire:~* Socio-demographic factors: sex, age,~* known risk-factor for Covid-19~* Professional factors: Employment (type, work time, location), protective measures put in place to reduce the risk of contamination~* Non-professional factors: Contact with infected individuals, carrying of protective equipment and compliance with barrier measures, transport and accomodation modalities during holidays"