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Volume 21, Number 7—July 2015

Determination of Predominance of Influenza Virus Strains in the Americas

Eduardo Azziz-BaumgartnerComments to Author , 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
Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (E. Azziz-Baumgartner, R.J. Garten, R. Palekar, S. Mirza, F.S. Palomeque, A. Moen, J. Bresee, M. Shaw, M.-A. Widdowson); Pan American Health Organization, Washington, DC, USA (R. Palekar, M. Cerpa, A.M. Ropero)

Main Article

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).

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Page created: June 15, 2015
Page updated: June 15, 2015
Page reviewed: June 15, 2015
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.