The overall aim of the study is to assess the effect of school-based Human Papillomavirus (HPV) vaccination by comparing type-specific HPV prevalence between vaccinated and non-vaccinated women born in 1997. Women born in 1997, residence to Norway in 2009 (the year of vaccine initiation of the 1997-cohort) are invited to participate in the study.
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Vaginal and oral HPV-6, HPV-11, HPV-16 and HPV-18 prevalence
Timeframe: Within 2 months after self-collection of specimens