Table 2. Circulating influenza virus strains relative to trivalent inactivated vaccine strain in Thailand including the study period.
| Circulating Strains | Trivalent Vaccine Formulation | |||
|---|---|---|---|---|
| Year (Thai Year) | A(H1N1) | A(H3N2) | B | Southern |
| 2009 (2552) | A/California/07/2009 (82%) | A/Brisbane/10/2007 (68%) | B/Brisbane/60/2008 V (77%) | A/Brisbane/59/2007 (H1N1) |
| A/Brisbane/59/2007 (18%) | A/Perth/16/2009 (32%) | B/Malaysia/2506/2004 V (32%) | A/Brisbane/10/2007 (H3N2) | |
| B/Florida/4/2006 V | ||||
| 2010 (2553) | A/California/07/2009(100%) | A/Perth/16/2009 (100%) | B/Brisbane/60/2008 V (89%) | A/California/7/2009 (H1N1) |
| B/Malaysia/2506/2004 V (11%) | A/Perth/16/2009(H3N2) | |||
| B/Brisbane/60/2008 V | ||||
| 2011 (2554) | A/California/07/2009(100%) | A/Perth/16/2009 (100%) | B/Brisbane/60/2008 V (93%) | A/California/7/2009 (H1N1) |
| B/Florida/60/2008 V (6%) | A/Perth/16/2009(H3N2) | |||
| B/Wisconsin/01/2010 Y (1%) | B/Brisbane/60/2008 V | |||
| 2012 (2555) | A/California/07/2009(100%) | A/Perth/16/2009 (58%) | B/Brisbane/60/2008 V (68%) | A/California/7/2009 (H1N1) |
| A/Victoria/361/2011 (42%) | B/Florida/60/2008 V (1%) | A/Perth/16/2009(H3N2) | ||
| B/Wisconsin/01/2010 Y (31%) | B/Brisbane/60/2008 V | |||
V = Influenza B Victoria linage; Y = Influenza B Yamagata lineage. Table adapted from Influenza viruses in Thailand: 7 years of sentinel surveillance data, 2004–2010, Chittaganpitch et al. Influenza and Other Respiratory Viruses DOI:10.1111/j.1750-2659.2011.00302.x.(years 2009–2010) and updated with data from http://www.thainihnic.org/influenza/main.php?option=newsletter (years 2011 to 2013). Note: Northern Hemisphere vaccine strains did not differ from southern vaccine strains after the inclusion of A/California/7/2009(H1N1) in April 2010.