Fig. 5: HA-K130N has gradually becoming dominant among human-isolated global circulating H1 strains since 2019.

a Polymorphic signatures at HA residue 130 of all H1 subtype viruses from 2015 to 2024. b Polymorphic signatures at HA residue 130 of swine H1 subtype viruses from 2019 to 2024 and HA residue 130 of all available avian H1 subtype viruses. c Phylogenetic analysis of the HA gene of the currently dominant lineage circulating among human H1 isolates. Source data are provided as a Source Data file.