Hospital-acquired influenza in the United States, FluSurv-NET, 2011–2012 through 2018–2019

To estimate population-based rates and to describe clinical characteristics of hospital-acquired (HA) influenza.Cross-sectional study.US Influenza Hospitalization Surveillance Network (FluSurv-NET) during 2011-2012 through 2018-2019 seasons.Patients were identified through provider-initiated or facility-based testing. HA influenza was defined as a positive influenza test date and respiratory symptom onset >3 days after admission. Patients with...