Phylogenetic tree for the hemagglutinin protein (H1 subtype) with colouration of its predicted identity within the PanVax strain. Irrelevant clades have been collapsed for clarity. A scale bar is shown that represents distance as substitutions per site. The location of the expected strain origin (A/California/07/2009) is labelled and the sum of probabilities for its clade of close relatives is shown in brackets as a percentage. The location of the A/Puerto Rico/08/1934 strain is also labelled.