Story Highlights. The average GPA at four-year colleges and universities has risen from 2.52 in the 1950s to 3.11 in 2006. Former Duke University professor found that at some colleges over 50% of the grades given are A's.
A. A. A. AIDS wasting syndrome occurs when you have AIDS and lose at least 10% of your body weight -- especially muscle. You may also have at least 30 days of diarrhea or extreme weakness and fever that's not related to an infection.
How AIDS develops. 1  The immune system is gradually disrupted. 2  Virus levels in the blood and the lymph nodes increase because the immune system cannot keep up with the amount of virus constantly produced. 3  HIV constantly changes itself, avoiding attack by the antibodies and immune cells that normally control infections.