A vaccine used to prevent anal, cervical, vaginal, and vulvar cancer caused by human papillomavirus (HPV) types 16 and 18 and genital warts caused by HPV types 6 and 11. It is also used to prevent lesions that may lead to anal, cervical, vaginal, or vulvar cancer. Gardasil is approved for use in males and females aged 9 to 26 years. It is a type of quadrivalent vaccine (a vaccine that works against four different viruses or other microorganisms). Also called recombinant human papillomavirus quadrivalent vaccine.