Table 2.
Influenza cases reported to the national influenza surveillance system of each participating country (from southern- to northernmost), and percentages of cases that were subtyped, by virus type. The Global Influenza B Study
| Country | Seasons | Influenza cases (n) | Influenza A cases (n, %) | Influenza B cases (n, %) | Influenza A cases subtyped (n, %) | Influenza B cases characterized (n, %) | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| New Zealand | 2000–2012 | 17 629 | 14 664 | 83·2 | 2965 | 16·8 | 11 670 | 79·6 | 2128 | 71·8 |
| Chile | 2008–2012 | 11 162 | 9983 | 89·4 | 1179 | 10·6 | 9488 | 95·0 | 646 | 54·8 |
| Argentina (Santa Fe) | 2009–2012 | 683 | 560 | 82·0 | 123 | 18·0 | 519 | 92·7 | 123 | 77·2 |
| South Africa | 2009–2013 | 1690 | 1098 | 65·0 | 592 | 35·0 | 1082 | 98·5 | 316 | 53·4 |
| Australia | 2001–2012 | 179 137 | 150 437 | 84·0 | 28 700 | 16·0 | 67 336 | 44·8 | 924 | 3·2 |
| Madagascar | 2002–2013 | 4068 | 2742 | 67·4 | 1326 | 32·6 | 2511 | 91·6 | 906 | 68·3 |
| Brazil | 2004–2012 | 3282 | 2399 | 73·1 | 883 | 26·9 | 0 | 0·0 | 0 | 0·0 |
| Indonesia | 2003–2007 | 3653 | 2339 | 64·0 | 1314 | 36·0 | 2313 | 98·9 | 662 | 50·4 |
| Singapore | 2007–2012 | 12 001 | 9690 | 80·7 | 2311 | 19·3 | 9690 | 100·0 | 904 | 39·1 |
| Kenya | 2007–2012 | 6344 | 4852 | 76·5 | 1492 | 23·5 | 2933 | 60·4 | 144 | 9·7 |
| Cameroon | 2009–2013 | 733 | 504 | 68·8 | 229 | 31·2 | 504 | 100·0 | 0 | 0·0 |
| Ivory Coast | 2007–2012 | 1581 | 975 | 61·7 | 606 | 38·3 | 867 | 88·9 | 0 | 0·0 |
| Panama | 2008–2013 | 2191 | 1868 | 85·3 | 323 | 14·7 | 1177 | 63·0 | 0 | 0·0 |
| Costa Rica | 2009–2012 | 6083 | 5569 | 91·6 | 514 | 8·4 | 5569 | 100·0 | 0 | 0·0 |
| Nicaragua | 2007–2013 | 5677 | 4924 | 86·7 | 753 | 13·3 | 4427 | 89·9 | 0 | 0·0 |
| El Salvador | 2006–2013 | 2473 | 1965 | 79·5 | 508 | 20·5 | 1348 | 68·6 | 0 | 0·0 |
| Honduras | 2009–2012 | 1701 | 1528 | 89·8 | 173 | 10·2 | 1140 | 74·6 | 0 | 0·0 |
| Guatemala | 2006–2013 | 4360 | 3856 | 88·4 | 504 | 11·6 | 2441 | 63·3 | 0 | 0·0 |
| Vietnam | 2006–2013 | 8647 | 5636 | 65·2 | 3011 | 34·8 | 5630 | 99·9 | 0 | 0·0 |
| Bhutan | 2009–2013 | 1350 | 943 | 69·9 | 407 | 30·1 | 940 | 99·7 | 0 | 0·0 |
| China (South) | 2006–2012 | 122 215 | 86 305 | 70·6 | 35 910 | 29·4 | 76 792 | 89·0 | 14 606 | 40·7 |
| Turkey | 2006–2011 | 2155 | 1747 | 81·1 | 408 | 18·9 | 1597 | 91·4 | 384 | 94·1 |
| China (North) | 2005–2012 | 64 306 | 44 350 | 69·0 | 19 956 | 31·0 | 39 931 | 90·0 | 8040 | 40·3 |
| Italy | 2002–2012 | 23 340 | 21 702 | 93·0 | 1638 | 7·0 | 20 474 | 94·3 | 12 | 0·7 |
| United States | 2000–2012 | 441 547 | 371 050 | 84·0 | 70 497 | 16·0 | 216 990 | 58·5 | 0 | 0·0 |
| Ukraine | 2000–2012* | 1389 | 1071 | 77·1 | 318 | 22·9 | 848 | 79·2 | 234 | 73·6 |
| England | 2003–2013 | 6276 | 4710 | 75·0 | 1566 | 25·0 | 4710 | 100·0 | 619 | 39·5 |
| Total | 935 673 | 757 467 | 81·0 | 178 206 | 19·0 | 492 926 | 65·1 | 30 648 | 17·1 | |
*
Seasons 2001–2002 and 2003–2004 in the Ukraine were not included as the number of reported influenza cases was <50.