Figure 6.
Maximum likelihood phylogenetic tree of NS gene of Canadian isolates and representative Eurasian (highlighted in yellow) and North American (gray) lineage influenza viruses. 2009 Canadian virus isolates are underlined.
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.