Randomized Controlled Trial of an Adjuvanted Human Papillomavirus (HPV) Type 6 L2E7 Vaccine: Infection of External Anogenital Warts with Multiple HPV Types and Failure of Therapeutic Vaccination

Abstract
Background.Cellular immunity is involved in spontaneous clearance of anogenital warts caused, most typically, by human papillomavirus (HPV) type 6 or