An official website of the United States government
Here's how you know
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.
Published by Oxford University Press for the Infectious Diseases Society of America 2017. This work is written by (a) US Government employee(s) and is in the public domain in the US.
Laboratory-confirmed influenza incidence per 1000 person-months by virus type and subtype and percentage of positives for influenza A and B, Peru Influenza Cohort Study, 2009–2015. Abbreviation: ILI, influenza-like illness.