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Continental synchronicity of human influenza virus epidemics despite climactic variation

Fig 6

Maximum likelihood phylogenetic trees of global influenza virus.

All available HA genetic sequences were downloaded from the GISAID EpiFlu database (platform.gisaid.org) for the following years and subtypes: (i) 2009 H1N1 (n = 10,016); (ii) 2014 H3N2 (n = 5,584); and (iii) 2015 Influenza B (n = 3,882). Sequences that were isolated from Australia are highlighted in red. More detailed analysis of patterns of spread within Australia are shown in S3 Fig.

Fig 6

doi: https://doi.org/10.1371/journal.ppat.1006780.g006