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Aids is becoming so widespread The disease called aids is becoming very widespread in the United States The question is why In the following paragraphs the answers to this question will be answered Aids is the final life-threatening stage of infection with human immuondeficiency virus HIV Aids stands for Acquired immunodeficiency virus syndrome The name refers to the fact that HIV severely damages the patients disease fighting immune system Cases of AIDS were first identified in 1981 in the United States but researchers have traced cases to as early as 1959 HIV can be present in the body for two to twelve or more years without producing any notifying sign of illness An infected person can transmit the virus to another person whether or not the symptoms are present Infection with HIV appears to be lifelong in all who become infected People infected with Hiv eventually develop symptoms that also may be caused by another less serious conditions Some symptoms include enlarged lymph glands tiredness fever loss of weight diarrhea and night sweats AIDS is caused by two viruses that belong to a group called retroviruses The virus became known as HIV-1 In 1985 scientists in France identified another closely related virus that produces AIDS This such virus became known as HIV-2 and occurs mainly just in Africa The virusHIV-1 is spread throughout the world HIV infects certain white blood cells including T-helper cells and macrophages that play key roles in the functioning of the human immune system The virus attaches to certain molecules found only on the surface of cells When an AIDS virus enters one of these cells the virus inserts its genes into the cells reproductive system and uses to produce more HIV The infection kills the CD-4 cell and spreads the AIDS viruses other CD-4 cells
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