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.
Maximum-Likelihood (GTR model) phylogenetic tree from HA fragment nucleotide sequence. Phylogenetic reconstruction was performed with 65 sequences selected from different origins, mainly Chile, South America and other regions of the world. The red highlighted sequence corresponds to the first Chilean human case HA sequence and shows the location within the 2.3.4.4b clade.
