Fig. 1.
Reported rates of hepatitis A and B, National Notifiable Diseases Reporting System (NNDRS), China, 1990–2008 (logarithmic scale).
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.