1. Swine-origin influenza A (H1N1) virus infections in a school—New York City, April 2009.;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2009
2. Swine influenza A (H1N1) infection in two children—Southern California, March–April 2009.;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2009
3. Outbreak of swine-origin influenza A (H1N1) virus infection—Mexico, March–April 2009.;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2009
4. Update: infections with a swine-origin influenza A (H1N1) virus—United States and other countries, April 28, 2009.;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2009
5. An outbreak of swine-origin influenza A (H1N1) virus with evidence for human-to-human transmission.;Naffakh;Microbes Infect,2009