GARDASIL Human Papillomavirus Quadrivalent is basically a anti-cancer injection. A re-combinant, this injection is highly recommended for girls and women of age 9 to 26. It is very useful in providing complete protection against vaginal, cervical, vulvar and anal cancers. In addition, it is also prescribed for genital warts caused by 9 types of HPV. Apart from this, this medicine also protects the boys and men of 9 to 26 against anal cancer and genital warts caused by those same HPV types.