FIGURE 3.
Genetic characterization of influenza viruses collected in and outside of the United States during May 20–October 13, 2018
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.