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.
Proportion of norovirus genogroup I (GI) and genogroup II (GII)–positive stools. Blue: GI; red: GII; green: GI/GII coinfection. Abbreviations: BG, Bangladesh; BR, Brazil; IN, India; NP, Nepal; NRV, norovirus; PE, Peru; PK, Pakistan; SA, South Africa; TZ, Tanzania.
