Seroprevalence and Immunoprotection Against COVID-19 in Parisian Children

The paediatric population present mild or asymptomatic form of SARS-CoV-2 infection. This study asses the frequency of patients with SARS-CoV2 Antibodies (Ab) (seroprevalence) and the neutralizing typology of those Ab (immunoprotection) in children from 7 days to 18 years of age hospitalized for no more than 4 days and whose clinical status requires blood sample regardless of the symptoms Patients are included on a given day, after information, before blood sampling performed as part of the care. 500 µL of sera, normally discarded will be kept to perform SARS-Cov2 serology.