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.
pH1N1 maximum likelihood phylogenetic trees (aLRT support >70 for all vaccine clades and major nodes) for the (A) HA and (B) NA segments for 14 samples from Cambodia and references in Genbank (grey) collected in 2011 and 2012. Vaccine strains are highlighted in red. Samples are colored coded by sampling site.
