Prevalence of infection with carcinogenic human papillomavirus among older women.

Infection with carcinogenic types of human papillomavirus (HPV) is necessary for the development of cervical intraepithelial neoplasia (CIN).[1][1],[2][2] The development of high-grade CIN and progression to cancer are associated with persistent infection with carcinogenic HPV.[3][3],[4][4] Because