Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Estimated population rates of influenza-associated hospitalization with 95% confidence intervals by influenza season and age group—U.S Influenza Hospitalization Surveillance Network (FluSurv-NET). Influenza A(H3N2) was the predominant circulating virus during the 2011–2012, 2012–2013, and 2014–2015 seasons. Influenza A(H1N1) predominated during the 2013–2014 season.
