CDC researchers find that too many people are diagnosed late.  Other studies confirm problem.
D015492:AIDS Serodiagnosis / Q000523:psychology / Q000706:statistics & numerical data*; D000293:Adolescent; D000328:Adult; D002487:Centers for Disease Control and Prevention, U.S.; D015658:HIV Infections / Q000175:diagnosis*; D006801:Humans; D008875:Middle Aged; D017410:Practice Guidelines as Topic; D012108:Research Personnel; D013997:Time Factors; D014481:United States; D055815:Young Adult