1. 1. Centers for Disease Control and Prevention (CDC). Outbreak of swine-origin influenza A (H1N1) virus infection-Mexico, March-April 2009. MMWR Morb Mortal Wkly Rep 2009;58:467-70.
2. 2. Centers for Disease Control and Prevention (CDC). Swine-origin influenza A (H1N1) virus infections in a school-New York City, April 2009. MMWR Morb Mortal Wkly Rep 2009;58:470-2.
3. 3. Centers for Disease Control and Prevention (CDC). Swine influenza A (H1N1) infection in two children - Southern California, March-April 2009. MMWR Morb Mortal Wkly Rep 2009;58:400-2.
4. 4. Influenza A (H1N1)-update 14. Geneva: World Health Organization; 2009. Available from: http://www.who.int/csr/don/2009_05_04a/en/index.html [Last accessed on 2009 May 04].
5. 5. Weekly Data of Influenza A H1N1 (For the week ending 2 nd January 2011) and cumulative no. of Lab confirmed cases and deaths-State wise. New Delhi: Office of the Director, Emergency Medical Relief, Directorate General of Health Services, India; 2011. Available from: http://www.mohfw-h1n1.nic.in/documents/PDF/SituationalUpdatesArchives/december2010/Situational%20Updates%20on%2027.12.2010.pdf [Last accessed on 2011 Jan 02].