Preliminary trends of reduction in genital warts in Campos dos Goytacazes, Rio de Janeiro, Brazil, 3 years after started quadrivalent HPV vaccination

摘要

Introduction: Among more than 100 types of human papillomavirus (HPV), 40 of them can infect the anogenital region. In Brazil, a high percentage of the population is infected with HPV, with an estimate of about 9-10 million of individuals infected, producing an annual incidence of 17,540 new cases of cervical cancer, responsible for 4000 deaths per year in the country. The main related HPV types of epidemiological importance are types 16 and 18 (high risk), responsible for 70% of cases of cervical cancer, and types 6 and 11 (low risk), which account for 90% of cases of genital warts. This virus can also be associated with other types of cancer in addition to affecting the anogenital tract, such as the cancer on the laryngeal, respiratory and digestive tracts6.