HIV, blood transfusions, Safer sex, infections, Referat, Hausaufgabe, AIDS
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1) WHAT IS AIDS? AIDS STANDS FOR Acquired Immune Deficiency Syndrome. Acquired. It is a condition that can be acquired, it is not inborn. Immune: concerns the body s defence mechanism the immune system. Deficiency: concerns damage to the immune system. Syndrome : a set of diseases or symptoms. AIDS is a condition in which progressive damage to the immune system has led to the development of certain illnesses. AIDS first came to light in the USA in 1981 when the Centers for Disease Control noticed a marked increase in a number of unusual infections, particularly amongst gay men. Doctors discovered that these men had an underlying deficiency of their immune system, but they had no idea what was causing it. The condition was named AIDS and as more cases emerged from the USA, Europe and Africa it became apparent that it was not confined to gay men. 2) WHAT CAUSES AIDS? In 1983 a breakthrough was made in understanding its cause and the virus that leads to AIDS was identified. This virus is known as HIV (the human immunodeficiency virus). It attacks the very cells in the body whose job it is to fight off infection the cells of the immune system. In particular the virus attacks a type of white blood cell known as the T-helper cell. These have a key role in the body s defence mechanism. The virus also infects blood cells and cells of the central nervous system. 3) OTHER THEORIES HIV does not cause AIDS by itself, but other factors such as another virus may be involved (scientists). ...

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