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.
Genotypes of H5N1 influenza reassortants in Asia. The eight gene segments are (horizontal bars starting at the top downward): PB2, PB1, PA, HA, NP, NA, M, and NS. Each color represents a virus lineage, with red indicating origin from Gs/GD/1/96. The definition of genotypes and the generation of genotypes Z, Z+, V, and W have been described (13). Novel genotype G seems to have resulted from reassortment between genotypes Z and W circulating in southern China.
