Table 3. Count of host-specific genomic signatures in each internal protein.
| Category\Protein | PB2 | PB1 | PA | NP | M1 | M2 | NS1 | NS2 | PB1-F2 | Total |
| Avian-Human | 20 | 14 | 15 | 20 | 5 | 14 | 18 | 4 | 19 | 129 |
| Swine-Human | 9 | 1 | 10 | 17 | 3 | 10 | 14 | 2 | 11 | 77 |
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