Table 2. Observed migration of influenza virus between Vietnam and other countries*.
| Virus subtype, country | Median no. events (95% range) |
|||||||
|---|---|---|---|---|---|---|---|---|
| PB2 | PB1 | PA | HA | NP | NA | MP | NS | |
| H3N2 | ||||||||
| Aus/NZ | 9 (5–13) | 9 (5–13) | 7 (4–10) | 7 (3–10) | 11 (6–16) | 5 (2–8) | 26 (19–33) | 27 (18–36) |
| Hong Kong | 4 (1–7) | 4 (1–8) | 6 (2–10) | 5 (2–8) | 6 (2–10) | 7 (3.5–12) | 12 (6–18) | 5 (1–10.5) |
| Taiwan | 2 (1–3) | 3 (2–4) | 3 (2–4) | 3 (1–4) | 2 (1–4) | 1 (0–3) | 3 (1–5) | 2 (1–5) |
| Singapore |
1 (0–3) |
1 (0–3) |
0 (0–2) |
1 (0–3) |
1 (0–6) |
1 (0–3) |
0 (0–2) |
1 (0–3) |
| H1N1 | ||||||||
| Taiwan | 3 (1–6) | 3 (1–5) | 4 (2–7) | 5 (2–7) | 5 (2–8) | 4 (2–8) | 5 (2–10) | 5 (2–8) |
| Aus/NZ | 2 (0–5) | 1 (0–4) | 2 (0–5) | 2 (0–5) | 4 (1–8) | 2 (0–4) | 5 (2–9) | 2 (0–6) |
| Japan | 2 (1–4) | 2 (1–4) | 2 (1–4) | 3 (1–4) | 4 (1–8) | 1 (0–2) | 6 (2–9) | 4 (2–7) |
*Data from 2,000 bootstrapped trees for all 8 segments of regional datasets for influenza subtypes H3N2 and H1N1. PB, polymerase basic protein; PA, polymerase acidic protein; HA, hemagglutinin; NP, nucleocapsid protein; MP, matrix protein; NS, nonstructural protein; Aus/NZ, Australia/New Zealand.