Figure 1.
Genotype distribution of 693 norovirus outbreaks in the United States, 1 September 2016–31 August 2017. Data are from [31].
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.