Epidemology of HIV/AIDS
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...AIDS Introduction Human immunodeficiency virus (HIV) was isolated in 1983 in a lymphadenopathy patient, and it took up to 1984, to be demonstrated distinctively to be the causative agent of AIDS. In 1981, AIDS was first recognized in the United States (Gallo and Montagnier, 2003). At this time, the U.S. Centers for Disease Control and Prevention (CDC) reported cases of Pneumocystis carinii pneumonia (PCP) in some otherwise healthy homosexual men of Los Angeles and 26 cases of Kaposi's sarcoma (KS), again in 26 homosexual individuals both in New York and Los Angeles (Klimas et al., 2008). It took, however, less time to identify that both male and female injection drug abusers... Epidemiology of HIV/AIDS...