Figure 3

The genetic (a) and antigenic map (b) for all 1968 non-redundant H3N2 HA1 protein sequences between 1968 and 2014. The viruses are colored by their year of discovery.
The genetic (a) and antigenic map (b) for all 1968 non-redundant H3N2 HA1 protein sequences between 1968 and 2014. The viruses are colored by their year of discovery.