Community Prevalence of SARS-CoV-2 Among Patients With Influenzalike Illnesses Presenting to a Los Angeles Medical Center in March 2020.

This study characterizes the prevalence of reverse-transcriptase polymerase chain reaction results positive for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) among patients presenting with influenzalike illness who underwent nasopharyngeal swab testing for influenza and respiratory syncytial virus over 4 days in March 2020.