Table 1 Pandemic influenza A (H1N1) viruses characterized by Sanger sequencing for amino acid position 222 of the HA
HA position 222 codon | Clinical outcome | ||
|---|---|---|---|
Mild (n = 27) | Severe (n = 26) | Fatal (n = 24) | |
222D (wt) | 100% (27) | 84. 6% (22) | 58. 2% (14) |
222D, 222E, 222G, 222N | 0% (0) | 7.7% (2) | 8.4% (2) |
222G | 0% (0) | 0% (0) | 12.5% (3) |
222D, 222G | 0% (0) | 7.7% (2) | 12.5% (3) |
222D, 222N | 0% (0) | 0% (0) | 4.2% (1) |
222D, 222V, 222A | 0% (0) | 0% (0) | 4.2% (1) |
All 222 variants | 0% (0) | 15.4% (4) | 41.8% (10) |