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ID number:365352
Evaluation:
Published: 03.06.2005.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Extract

Human immunodeficiency virus or HIV is a disease like no other. A virus studied for more than 30 years, yet no vaccine was developed. HIV which causes AIDS (Acquired Immunodeficiency syndrome) was believed to be present in North America, Europe, and Africa for several decades before the earliest cases appeared in 1980 (Mann, 1989). There are several theories behind the origin of HIV. The simian immunodeficiency virus (SIV) found in chimpanzees, is believed to have been transmitted to humans becoming HIV-1, the virus that causes AIDS, a cross species transmission. …

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