- To determine the protective effect of the HPV-6, -11, -16, -18 vaccine in preventing penile/scrotal condyloma and HPV-6, -11, -16, -18- associated perianal/anal disease in HIV-positive males who have sex with males (MSM) age 13-26 years by comparing the incidence of these lesions among those naïve to the relevant HPV type(s) at baseline to those who are not naïve at baseline.