Study : Circumcision reduces risk of HPV infection and cancer , but not HIV . Circumcision known to reduce risk of HIV infection and penile cancer . 64 percent of American baby boys born in ' 80s , down from 68 percent in 70s .
Study : Circumcision reduces risk of HPV infection and herpes , but not syphilis . Circumcision known to reduce risk of HIV infection and penile cancer . 64 percent of American baby boys circumcised in '95 , down from 90 percent in 70s .