INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2000 - 2001 Season
| Week | A(H1N1) | A(H3N2) | A(Unk) | B | Total # Tested | % Positive |
|---|---|---|---|---|---|---|
| 40 | 0 | 0 | 0 | 1 | 1204 | 0.1 |
| 41 | 2 | 0 | 2 | 0 | 1252 | 0.3 |
| 42 | 1 | 0 | 1 | 2 | 1425 | 0.3 |
| 43 | 7 | 3 | 1 | 2 | 1265 | 1 |
| 44 | 10 | 1 | 3 | 3 | 1707 | 1 |
| 45 | 24 | 1 | 4 | 3 | 1468 | 2.2 |
| 46 | 17 | 1 | 11 | 12 | 1948 | 2.1 |
| 47 | 20 | 2 | 30 | 23 | 2049 | 3.7 |
| 48 | 30 | 1 | 22 | 32 | 2088 | 4.1 |
| 49 | 51 | 3 | 66 | 41 | 2616 | 6.2 |
| 50 | 55 | 1 | 99 | 47 | 2917 | 6.9 |
| 51 | 98 | 3 | 145 | 101 | 3076 | 11.3 |
| 52 | 108 | 0 | 187 | 116 | 2946 | 14 |
| 1 | 135 | 12 | 155 | 137 | 3075 | 14.3 |
| 2 | 191 | 9 | 271 | 235 | 3610 | 19.6 |
| 3 | 219 | 10 | 462 | 308 | 4360 | 22.9 |
| 4 | 256 | 5 | 496 | 432 | 4925 | 24.1 |
| 5 | 224 | 5 | 436 | 449 | 4851 | 23 |
| 6 | 142 | 5 | 273 | 455 | 4570 | 19.1 |
| 7 | 58 | 2 | 174 | 345 | 3787 | 15.3 |
| 8 | 35 | 2 | 88 | 263 | 2813 | 13.8 |
| 9 | 14 | 2 | 37 | 84 | 1100 | 12.5 |