Volume 21, Number 7—July 2015
Dispatch
Determination of Predominance of Influenza Virus Strains in the Americas
, Rebecca J. Garten, Rakhee Palekar, Mauricio Cerpa, Sara Mirza, Alba Maria Ropero, Francisco S. Palomeque, Ann C. Moen, Joseph S. Bresee, Michael Shaw, and Marc-Alain Widdowson
Table 1
Most commonly identified antigenic characterizations of influenza strains in the Americas during 2002–2013*†
| Year | Influenza A(H1N1) virus |
Influenza A(H3N2) virus |
Influenza B virus |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| South | Central | North | South | Central | North | South | Central | North | |||
| 2001 | A | NA | A | A | NA | A | A | NA | B‡ | ||
| 2002 | A | NA | A | A | NA | A | B | B | B | ||
| 2003 | A | NA | A | A | B | B‡ | B | NA | C‡ | ||
| 2004 | NA | NA | A | B | B | C‡ | C | C | C | ||
| 2005 | A | NA | A | C | C | C | D‡ | E‡ | D | ||
| 2006 | A | A | A | D‡ | D | D | E | D/E | D | ||
| 2007 | A | A | B‡ | E‡ | E | E | F‡ | F | F | ||
| 2008 | C‡ | C | C | E | E | E | F | F | G‡ | ||
| 2009 | D‡ | D | D | E | E | F‡ | F | G | G | ||
| 2010 | D | D | D | F | F | F | G | G | G | ||
| 2011 | D | D | D | F | F | F | G | G | G | ||
| 2012 | D | D | D | F | F | F | H‡ | G | H | ||
| 2013 | D | D | D | G‡ | G | H‡ | G | I‡ | I | ||
| 2014 | D | D | D | H | H | H | I | I | I | ||
*Data from Canada, Mexico, and the United States were aggregated to represent North America; data from Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama to represent Central America; and data from Argentina, Brazil, Chile, Paraguay, and Uruguay to represent South America.
†For influenza A(H1N1) virus, A, A/New Caledonia/20/99(H1N1); B, A/Solomon Islands/03/2006(H1N1); C, A/Brisbane/59/2007(H1N1); D, A/California/07/2009-(H1N1)pdm09. For influenza A(H3N2) virus, A, A/Panama/2007/99(H3N2); B, A/Fujian/411/2002(H3); C, A/California/07/2004(H3N2); D, A/Wisconsin/67/2005(H3N2); E, A/Brisbane/10/2007(H3N2); F, A/Perth/16/2009(H3N2); G, A/Victoria/361/2011(H3N2); H, A/Texas/50/2012(H3N2). For influenza B virus, A, B/Sichuan/379/99(YAM); B, B/Shandong/7/97(VIC); C, B/Shanghai/361/2002(YAM); D, B/Malaysia/2505/2005(VIC); E, B/Florida/07/2004(YAM); F, B/Florida/04/2006(YAM); G, B/Brisbane/60/2008(VIC); H, B/Wisconsin/01/2010(YAM) I, B/Massachusetts/02/2012(YAM). NA, not applicable.
‡Newly identified strain (8 in South America, 2 in Central America, and 8 in North America).