AIDS: what is it? Who is at risk? How can it be prevented?
D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control*; D001803:Blood Transfusion; D006467:Hemophilia A; D006716:Homosexuality; D006801:Humans; D008297:Male; D011634:Public Health; D012306:Risk; D014481:United States