INFLUENZA VIRUSES ISOLATED BY
WHO/NREVSS Collaborating Laboratories
2001 - 2002 Season
Year/Week (yyyyww) Number of Labs Reporting Total Specimens Tested A(H1N1) A(H3N2) A (subtyping not performed) B Total Isolates Percent Positive
200140 96 1154 0 4 3 1 8 0.69
200141 104 1415 0 2 3 0 5 0.35
200142 107 1468 0 3 5 0 8 0.54
200143 112 1583 0 9 8 0 17 1.07
200144 104 1704 1 6 6 0 13 0.76
200145 112 1843 0 12 1 0 13 0.71
200146 114 2096 0 37 8 1 46 2.19
200147 117 2052 0 25 5 3 33 1.61
200148 118 2401 0 50 23 1 74 3.08
200149 117 2331 1 34 43 5 83 3.56
200150 115 2434 2 39 69 2 112 4.60
200151 123 2915 3 44 118 4 169 5.80
200152 116 2621 0 51 168 1 220 8.39
200201 128 3531 0 108 234 2 344 9.74
200202 127 3900 0 144 390 6 540 13.85
200203 125 4696 1 268 653 5 927 19.74
200204 135 5816 4 387 840 12 1243 21.37
200205 129 6466 3 450 997 24 1474 22.80
200206 134 7191 6 613 1001 19 1639 22.79
200207 134 7572 4 615 1160 28 1807 23.86
200208 129 7358 11 538 1216 68 1833 24.91
200209 127 6217 8 384 947 86 1425 22.92
200210 130 5368 7 264 730 136 1137 21.18
200211 126 4337 6 156 475 166 803 18.52
200212 125 3763 2 103 254 210 569 15.12
200213 118 3332 3 44 127 284 458 13.75
200214 118 2660 3 20 72 235 330 12.41
200215 111 2329 4 17 40 192 253 10.86
200216 109 2001 6 18 12 226 262 13.09
200217 110 1820 1 9 8 138 156 8.57
200218 107 1643 1 11 7 149 168 10.23
200219 107 1655 1 0 4 140 145 8.76
200220 97 1467 1 0 1 86 88 6.00
200221 79 1302 0 0 3 61 64 4.92
200222 76 995 0 0 2 34 36 3.62
200223 74 948 0 0 1 25 26 2.74
200224 73 850 0 0 0 7 7 0.82
200225 66 692 0 0 0 2 2 0.29
200226 69 700 0 0 0 4 4 0.57
200227 64 490 0 0 0 2 2 0.41
200228 66 591 0 0 0 1 1 0.17
200229 66 578 0 0 0 0 0 0.00
200230 66 601 0 0 1 1 2 0.33
200231 69 530 0 0 0 0 0 0.00
200232 67 566 0 0 0 0 0 0.00
200233 62 516 0 0 0 0 0 0.00
200234 63 533 0 0 0 0 0 0.00
200235 65 588 0 0 0 1 1 0.17
200236 62 482 0 0 0 0 0 0.00
200237 54 561 0 0 0 0 0 0.00
200238 54 475 0 1 1 1 3 0.63
200239 42 391 0 0 0 2 2 0.51
Total 5118 79 4466 9636 2371 16552 121528 13.62

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