HIV is the human immunodeficiency virus . HIV is one of the most deadly diseases in the human history. HIV causes a condition called acquired immunodeficiency syndrome - better known as Aids.
"These lymphocytes are part of the body's immune system, the defense system that fights infections. When HIV destroys these lymphocytes, the immune system becomes weak and people can get serious infections that they normally wouldn't." - Kids Health .
http://kidshealth.org/teen/infections/stds/std_hiv.html
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