Images from 
An Ounce of Prevention: HPV and the First Cancer Vaccine
Source: Giuliano AR. J Infect Dis. 2002, 186:462-469
Images from 
An Ounce of Prevention: HPV and the First Cancer Vaccine
Hailed by many doctors as a breakthrough in cancer prevention, the human papillomavirus vaccine, Gardasil, prevents infections from two strains of the sexually transmitted human papillomavirus, or HPV, that may lead to cervical cancer. (AP Photo/Charles Rex Arbogast)