Influenza A(H3N2) Outbreak on a University Campus - Michigan, October-November 2021.

On November 10, 2021, the Michigan Department of Health and Human Services (MDHHS) was notified of a rapid increase in influenza A(H3N2) cases by the University Health Service (UHS) at the University of Michigan in Ann Arbor. Because this outbreak represented some of the first substantial influenza activity during the COVID-19 pandemic, CDC, in collaboration with the university, MDHHS, and local partners conducted an investigation to characterize and help control the outbreak. Beginning August 1, 2021, persons with COVID-19-like* or influenza-like illness evaluated at UHS received testing for SARS-CoV-2, influenza, and respiratory syncytial viruses by rapid multiplex molecular assay.

Déclaration de conflit d'intérêts

All authors have completed and submitted the International Committee of Medical Journal Editors form for disclosure of potential conflicts of interest. Emily T. Martin reports grants from Merck, outside the submitted work. Adam S. Lauring reports personal fees from Sanofi and personal fees from Roche, outside the submitted work. No other potential conflicts of interest were disclosed.