sentences:  A 2006 meta-analysis found that circumcision was associated with lower rates of syphilis, chancroid and possibly genital herpes.A 2010 review found that circumcision reduced the incidence of HSV-2 (herpes simplex virus, type 2) infections by 28%.The researchers found mixed results for protection against trichomonas vaginalis and chlamydia trachomatis, and no evidence of protection against gonorrhea or syphilis.