TABLE III. Influenza B detection and lineage identification by year.
| Yeara | Samples tested (n = 2,992) | Influenza B+ n (%) | Yamagata-like n (%) | Victoria-like n (%) | Vaccine lineageb |
|---|---|---|---|---|---|
| 2001 | 74 | 12 (16.2) | 11 (100) | - | Yamagata |
| 2002 | 212 | 21 (9.9) | 5 (25) | 15 (75) | Yamagata |
| 2003 | 130 | 0 | - | - | Victoria |
| 2004 | 190 | 7 (3.7) | - | 6 (100) | Victoria |
| 2005 | 73 | 1 (1.4) | 1 (100) | - | Yamagata |
| 2007 | 32 | 0 | - | - | Victoria |
| 2008 | 370 | 17 (4.6) | 9 (56) | 7 (44) | Yamagata |
| 2009 | 586 | 5 (0.8) | 5 (100) | - | Yamagata |
| 2010 | 438 | 20 (4.7) | 19 (95) | 1 (5) | - |
| 2011 | 435 | 24 (5.5) | - | 24 (100) | Victoria |
| 2012 | 207 | 1 (0.5) | - | 1 (100) | Victoria |
| 2013 | 245 | 6 (2.4) | - | 5 (100) | Yamagata |
a: there was no sampling during 2006; b: vaccine recommendation for Southern Hemisphere. Vaccine distributed in Brazil during 2010 contained only the influenza A(H1N1)pdm09 strain.