Epidemiological and Virological Characterization of 2009 Pandemic Influenza A Virus Subtype H1N1 in Madagascar

Arnaud Orelle, Norosoa Harline Razanajatovo, Soatiana Rajatonirina, Jonathan Hoffmann, Laurence Randrianasolo, Girard Marcellin Razafitrimo, Dhamari Naidoo, Vincent Richard, and Jean-Michel Heraud National Influenza Center, Virology Unit, and Epidemiology Unit, Institut Pasteur de Madagascar, and Centre d’Infectiologie Charles Merieux, Faculte de Medecine, Universite d’Ankatso, Antananarivo, Madagascar; and National Influenza Unit, National Institute for Communicable Diseases of the National Health Laboratory Service, Sandringham, South Africa