* Over 14 months, they collected nearly 5,000 swabs, finding a significant correlation between positive floor swabs and the identification of Covid-19 outbreaks, especially during outbreak periods.
* The results indicate that floor sampling could be a valuable tool for early detection of Covid-19 outbreaks, with many positive swabs occurring days before the official outbreak identification.
Background: SARS-CoV-2 can be detected from the built environment (e.g., floors), but it is unknown how the viral burden surrounding an infected patient changes over space and time.