(B) For a subset of 85 NP swab samples for which sufficient material remained, SARS-CoV-2 negative-strand E RNA levels were determined by strand-specific RT-PCR with tagged primers. Data information: Culture supernatants were harvested when cells displayed CPE or at day 7 if no CPE was observed earlier, clarified, and presence (blue square) or absence (yellow circle) of infectious SARS-CoV-2 determined by immuno-focus assay. 