Figure 1.
Respiratory syncytial virus cases, distribution of children, Lanzhou, northwestern China, December 2010 to May 2017 (n = 2175).
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.