Fig. 1

Reassortant lineages and variants found among H3N2 genomes sampled between 2008 and 2014. The full genome maximum likelihood phylogenetic tree shows 16 reassortant clades/lineages highlighted in Baby Blue (I), Dark Blue (II), Light Blue (III), BlueD (IV), GreenD (V), GreenL (VI), Green (VII), Dark Green (VIII), Salmon (IX), Red (X), Maroon (XI), Dark Red (XII), Orange (XIII), Purple (XIV), Lavender (XV), and Pink (XVI) (in the order of appearance in the tree) and single reassortants marked in yellow. Vaccines and important vaccine candidate names are positioned next to their approximate position in the tree. Years of vaccine use are in parentheses next to the vaccine names. The three most distinct non-reassortant clades are named in black text. All reassortant and vaccine clades had node confidence values >0.7 (aLRT)