AIDS--a public health crisis.
D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control / Q000635:transmission; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006266:Health Education; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D011634:Public Health; D012725:Sexual Behavior