Cervical cancer is a serious public health problem and the leading cause of cancer deaths in Peruvian women. The human papillomavirus (HPV) has been identified as the cause of cervical cancer. More specifically, HPV types 16 and 18 are responsible for about 70% of these cancers. There is an effective vaccine against those two types, but vaccination is not universally used and vaccinated women will still need screening for lesions caused by other HPV types. The Peruvian government has committed to start vaccination in young women; screening is performed using cytology (the study of cells).