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.
Boxplots show the range of metric values observed each season across 97 cities and 48 states. ILI+ measures the number of influenza positive patients per 100 visits to outpatient visits to health care providers.
