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.
The phylogenetic relationships among some subtype H5 highly pathogenic influenza viruses based on their heamagluttinin sequences. The H5N2 subtype viruses identified in China in recent years are marked with black triangles. Bootstrap values are given at relevant nodes.
