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. 2014 Jan 8;9(1):e84638. doi: 10.1371/journal.pone.0084638

Table 1. Number of influenza A sequences in study (1902–2013).

Host\Protein PB2 PB1 PA NP M1 M2 NS1 NS2 PB1-F2
Avian 4207 3823 4052 2657 1144 1406 2624 1245 2215
Human 3025 2713 2698 1768 992 1478 1960 789 780
Swine 1129 1076 1109 985 625 834 951 579 379