Incremental cost-effectiveness ratios of including pre-adolescent boys in the childhood vaccination program compared to vaccination of pre-adolescent girls only.

aAssumes a cost per dose of $75, exclusive of the administration cost (≈$14 per dose).bCompared to no vaccination.cCompared to girls-only vaccination.dIncludes female cervical, vulvar, vaginal, anal and oropharyngeal cancers,eIncludes male anal, oropharyngeal and penile cancers,fIncludes cervical, vulvar, vaginal, anal, oropharyngeal and penile cancers related to HPV-16, -18, and genital warts and recurrent respiratory papillomatosis related to HPV-6, -11.