This study is a retrospective matched (paired) cohort study comparing HPV detection rates in young women 19-20 years who have previously received 3 doses of the 4vHPV vaccine, Gardasil®in 2012 and young women of the same age group who haven’t previously received any HPV vaccine. The unvaccinated group will be matched for age and place of residence. A non-random sampling proportional to size method of 2000 young women aged 19-20 years old from Bayangol and Baganuur districts and Omnogobi and Selenge provinces will be included in this study. The aim of this study is to compare HPV detection rates with high-risk genotypes 16 and 18/45 among vaccinated and unvaccinated women, to compare HPV detection rates with 11 other high-risk genotypes (31, 33, 35, 39, 51, 52, 56, 58, 59, 66 and 68) among vaccinated and unvaccinated and to evaluate knowledge, attitude and practices of young Mongolian women about HPV and cervical cancer.