Rate of HIV infection on rise among Ontario's gay men.
D015658:HIV Infections / Q000175:diagnosis / Q000453:epidemiology*; D007722:Health Knowledge, Attitudes, Practice; D018451:Homosexuality, Male / Q000523:psychology / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D009864:Ontario / Q000453:epidemiology; D011159:Population Surveillance; D012736:Sex Education