1Fraser C, Donnelly CA, Cauchemez S, et al. Pandemic potential of a strain of influenza A (H1N1): early findings [J]. Science, 2009, 324(5934): 1557-1561.
2Perez-Padilla R, de la Rosa-Zamboni D, Ponce de Leon S, et al. Pneumonia and respiratory failure from swine-origin influenza A (H1N1) in Mexico [J]. N Engl J Med, 2009, 361 (7): 680- 689.
3Centers for Disease Control and Prevention (CDC). Swine influenza A(H1N1 ) infection in two children-Southern California, March-April 2009 [J]. MMWR Morb Mortal Wkly Rep, 2009, 58 ( 15 ) : 400-402.
4Liu C, Liu LF, Wang B, eta/. A review on 2009 influenza A virus [J]. Agr Sci & Technol, 2012, 13 (2): 424-427.