Figure 1
From: Infection of novel reassortant H1N2 and H3N2 swine influenza A viruses in the guinea pig model
Phylogenetic trees based on HA sequences of subtype H1. Maximum Likelihood method and General Time Reversible model with a variation rate among sites given by gamma distribution with invariant sites (GTR + G + I) were used. Human and swine reference sequences are in black. Branches of Chilean IAVs-S sequences are in red, and nodes of selected viruses for guinea pig infection are highlighted with a red circle.