Official title and information are available only for Plus and Premium subscribers.
Patent Granted One of the obstacles to treatment of the human immunodeficiency virus is its high genetic variability.[1] HIV can be divided into two major types, HIV type 1 (HIV-1) and HIV type 2 (HIV-2). HIV-1 is related to viruses found in chimpanzees and gorillas living in western Africa, while HIV-2 viruses are related to viruses found in the endangered west