Syphilis rise not increasing HIV infections.
D015658:HIV Infections / Q000453:epidemiology*; D018451:Homosexuality, Male / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D009017:Morbidity / Q000639:trends; D012495:San Francisco / Q000453:epidemiology; D013587:Syphilis / Q000453:epidemiology*