1. http://www.cdc.gov/hiv/basics/whatishiv.html
2. http://www.avert.org/worldwide-hiv-aids-statistics.htm
3. 2013 http://search.unaids.org
4. Estimate of HIV prevalence and number of people living with HIV in India 2008-2009;Pandey;BMJ Open,2012
5. National AIDS Control Organization (NACO) http://www.naco.gov.in/NACO/Quick_Links/Publication/Annual_Report/NACO_Annual_Report/