The wastewater from 28 of 29 airline flights in in Kuala Lumpur, Malaysia, collected from June to December 31 of last year contained the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Using travel testing data for SARS-CoV-2 infection obtained from international arrivals and departures, Adam J. Kucharski and colleagues estimate SARS-CoV-2 prevalence in multiple countries.