What does AIDS stand for?

F: Good morning, Doctor Lewis.
M: Good morning, Miss Davis.
F: It is World AIDS Day today, and the theme of this year is "Men make a difference. "Most people may only have a vague idea about. Could you tell us more about it? For example, what does the word AIDS exactly mean?
M: Well, AIDS is made of initials of Acquired Immune Deficiency Syndrome. The AIDS virus, known as HIV, destroys part of the body’ s immune system, leaving the victims unable to defend themselves against infections and certain kinds of cancer. The AIDS virus may lie quietly inside the body’ s cells fro as long as 15 years and then suddenly burst forth.
F:  And so far scientists haven’ t found the cure?
M: In 1995, scientists used the "cocktail therapy", which was quite a success. But it proved to be too expensive, and common people couldn’t afford it. The first case of AIDS was reported in 1981. More than twenty years have passed and still there is no efficient cure to it. We should appeal to the society fighting a battle against the disease.