Extension of public comment period for revision of HIV infection classification system and expansion of AIDS surveillance case definition.
D000163:Acquired Immunodeficiency Syndrome; D000293:Adolescent; D000328:Adult; D002487:Centers for Disease Control and Prevention, U.S.; D015658:HIV Infections / Q000145:classification*; D006801:Humans; D011159:Population Surveillance; D014481:United States