Aids

Aids first appeared in 1959. Its definition states that its both of a comp any(prenominal) of retrovir subprograms and esp. HIV-1 that infect and destroy helper T cells of the repellent dust causing the marked reduction in their exits that is diagnostic of AIDS -- called also AIDS virus, human immunodeficiency virus. A retrovirus is any of a group of RNA-containing viruses (as HIV) that produce reverse transcriptase by means of which DNA is produced using their RNA as a template and incorporated into the genome of infected cells and that include numerous tumorigenic viruses. During the 2000 grade 5.3 million people were newly infected with HIV/AIDS. At the end of the 2000 form 36.1 million people will be living with HIV/AIDS         Where did it come from? Scientists have mingled theories about the origin of HIV, but none have been proven. The soonest known case of HIV was from a blood pattern collected in 1959 from a man in Kinshasha, antiauthoritaria n Republic of Congo. (How he became infected is not known.) Genetic psychoanalysis of this blood sample suggests that HIV-1 may have stemmed from a single virus in the late 1940s or early 1950s. We do know that the virus has existed in the amalgamate States since at least the mid- to late 1970s.

From 1979-1981 rare types of pneumonia, cancer, and other illnesses were be reported by doctors in Los Angeles and New York among a add of gay male patients. These were conditions not usually found in people with wellnessy immune systems. In 1982 public health officials began to use the term acquired immunodeficiency syndrome, or AIDS, to descri be the occurrences of opportunistic infectio! ns, Kaposis sarcoma, and Pneumocystis carinii pneumonia in previously healthy men. Formal tracking (surveillance) of AIDS cases began that year in the United States. The cause of... If you want to get a rich essay, order it on our website: BestEssayCheap.com

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