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Table 5 Top five combination subtypes of AIVs, HuIVs, SIVs, EIVs, and CIVs with the relevant strain numbers given in parentheses

From: Diversity and distribution of type A influenza viruses: an updated panorama analysis based on protein sequences

  First Second Third Fourth Fifth
AIVs H5N1 (1931) H9N2 (1753) H5N2 (641) H3N8 (633) H4N6 (542)
HuIVs H3N2 (6816) H1N1 (6328) H5N1 (215) H2N2 (80) H7N9 (59)
SIVs H1N1 (2375) H1N2 (1945) H3N2 (1737) H3N1 (34) H5N1 (19)
EIVs H3N8 (808) H7N7 (24) H5N1 (1) H9N2 (1)  
CIVs H3N8 (217) H3N2 (60) H5N1 (4) H3N1 (2)