Multicenter study on nosocomial transmission of SARS-CoV2 virus - Ancillary study of NOSO-COR Project FRESH-PEF73994-en PHILIPPE VANHEMS Multicenter study on nosocomial transmission of SARS-CoV2 virus - Ancillary study of NOSO-COR Project NOSO-COR-IMMUNO FRESH-PEF73994-en 73994 FRESH-PEF73994 Philippe VANHEMS HOSPICES CIVILS DE LYON (HCL) Epidemiology France Portal (PEF) null Philippe;VANHEMS Infectious disease medicine Certain infectious or parasitic diseases COVID-19 The main objective of this ancillary study is to describe the serological response in people infected with SARS-CoV-2 at a distance from the infectious episode. Secondary objectives : 1. Characterization of virus-specific CD8 T populations, phenotype and functional capacity, present in circulation (PBL) 2. Titration of neutralizing vs. facilitating antibodies 3. Comparison of patient memory immune response characteristics 4. Study of post-COVID19 immune restoration 5. Establishment of a collection of biological salivary and blood samples at HCL (serum and peripheral blood mononuclear cells (PBMC)) and transfer of part of the blood products before the end of the research to the Centre International de Recherche en Infectiologie (CIRI) to initiate research for new scientific knowledge on SARS-CoV-2 pathogens null France Auvergne Rhône-Alpes Individuals Patients population Male Female Adult (25 to 44 years) Middle Aged (45 to 64 years) Aged (65 to 79 years) Aged, 80 and over (80 years and more) Clinical data Participant-reported health data Biological data Socio-demographic data Data collected by doctors in face-to-face interviews entered by Prof. Vanhems\' epidemiology team in an e-CRF created by HCL data managers. Data analysed by the HCL biostatistics team. Other Through organizations (health services or institutions schools businesses etc.) Physical/biological measurements (blood pressure, weight, biochemistry, imaging, etc.) Observational Study Observational Study 189 Unknown Restricted access