How Does HIV Progress Into AIDS?
Acquired immunodeficiency syndrome, or AIDS, is the disease caused by infection with human immunodeficiency virus 1, or HIV. The World Health Organization estimates that as of 2010, HIV has resulted in 25 million AIDS-related deaths since it was identified in the 1980s. Data from 2008 indicates that 33.4 million people are living with HIV/AIDS; 2.7 million new HIV infections are estimated to occur each year, with 2 million AIDS-related deaths.