Background: Evidence as to whether childcare and school closure limits the spread of SARS-CoV-2 virus is limited, especially because the role of children in SARS-CoV2 transmission remains unclear.
Methods: Between May 29 and July 2, 2020, a retrospective cohort study was conducted among two populations: requisitioned health-care workers and requisitioned staff from hospitals childcare centers, to investigate the virus circulation during lockdown, in a French area of high transmission.
Results: The infection attack rate was 6/52 (11.6%) and 8/46 (17.4%) among health-care workers and childcare staff, respectively. An early epidemic occurred among Montreuil s hospital childcare staff, but the parents were not affected (p=0.029). Among Aulnay-sous-bois childcare center, three staff members were infected but none of them was in charge of a child whose parents were infected. Also among the parents of the children they cared for, none developed antibodies. Out of 14 infections, 12 were reliable to a source of transmission, mostly among colleagues.
Discussion-conclusion: The assessment of viral circulation among healthcare workers and childcare staff suggests that the children did not contribute to SARS-CoV-2 spread in our setting.
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