Seroprevalence of IgG Antibodies to SARS-CoV-2 (COVID-19) in Primary Health Care Workers and Their Household Contacts

Self-sampling dried-blood spot (DBS) kits will be send to each participant including material (a DBS card, lancets, pad), detailed printed instructionson how to perform thetest, and a self-addressed stamped padded envelope to be returned with the card to the centralized biobank (CEPH Biobank, Paris, France). Tubes will be sent sent to the virology laboratory (Unité des virus Émergents, Marseille, France) for serological analysis.