http://www.fda.gov/BiologicsBloodVaccines/Vaccines/QuestionsaboutVaccines/ucm096052.htmFurthermore, women aren't protected if they have already been infected with the HPV types(s) that are covered by the vaccine prior to vaccination.No, Gardasil only works to prevent cervical cancer, precancerous genital lesions and genital warts due to human papillomavirus (HPV); it won't work as treatment.The results of the studies show that the vaccine only works when given prior to infection with HPV types 6, 11, 16 and 18.