Aids

Aids first appeared in 1959. Its definition states that its any of a multitude of retroviruses and esp. human immunodeficiency virus-1 that infect and destroy helper T cells of the insubordinate formation causing the marked reduction in their poetry 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 temp upstart and incorporated into the genome of give cells and that include legion(predicate) tumorigenic viruses. During the 2000 yr 5.3 million lot were newly infected with HIV/AIDS. At the end of the 2000 year 36.1 million people leave be living with HIV/AIDS Where did it come from? Scientists gravel different theories well-nigh the origin of HIV, but none suffer been proven. The earliest cognise case of HIV was from a call in circuit sample roll up in 1959 from a man in Kinshasha, Democratic republic of Congo. (How he became infected is non kip downn.) Genetic analysis of this blood sample suggests that HIV-1 whitethorn have stemmed from a ace virus in the late 1940s or aboriginal 1950s. We do know that the virus has existed in the joined States since at least the mid- to late 1970s.

From 1979-1981 rare types of pneumonia, cancer, and other illnesses were being describe by doctors in Los Angeles and New York among a number of audacious male patients. These were conditions not usually found in people with hefty resistant systems. In 1982 public health officials began to use the endpoint acquired immunodeficiency syndrome, or AIDS, to describe the occurrences of opportunistic infections, Kaposis sarcom! a, and Pneumocystis carinii pneumonia in previously healthy men. titular tracking (surveillance) of AIDS cases began that year in the United States. The elbow grease of... If you want to get a full essay, assure it on our website: OrderEssay.net

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