Heavy exposure of children aged 9 to 12 years with SARS-CoV-2 did not lead to infection.

The reason for the apparently lower infection rate of children with SARS-CoV-2 compared to adults is still unclear. Here, we report on four school children with heavy exposure to SARS-CoV-2 with no clinical signs of COVID-19, repeated negative nasopharyngeal swabs for SARS-CoV-2 RNA, and no seroconversion.