HPV vaccination of young women may protect men through herd immunity
Source: www.medscape.com Author: Laurie Barclay, MD High coverage of quadrivalent human papillomavirus (HPV) vaccination in young Australian women resulted in a lower frequency of genital warts, which might protect heterosexual men through herd immunity, according to the results of an analysis of national sentinel surveillance data published online November 9 in Lancet Infectious Diseases. "The natural history of cervical and HPV-associated diseases is slow," Mark H. Einstein, MD, MS, associate professor of obstetrics and gynecology and women's health, and director of clinical research for women's health and gynecologic oncology at Albert Einstein College of Medicine and Albert Einstein Cancer Center, Montefiore Medical Center, in New York City, told Medscape Medical News when asked for independent comment. "This is the first registry-based study that has already shown the declines after vaccinating a large population of vaccine-eligible adolescents and young adults. This prospectively shows what all the models have been predicting all along." The annual incidence of genital warts has been increasing for decades and is currently about 1% in young, sexually active people. Up to 90% of cases of genital warts are caused by HPV types 6 and 11, which are 2 of the 4 types targeted by the quadrivalent HPV vaccine used in Australia (Gardasil; CSL Biotherapies). "While it will probably be as effective as the quadrivalent HPV vaccine at preventing anogenital and other cancers, the bivalent HPV vaccine (Cervarix, GSK) used in the UK national program provides no protection against genital warts," lead author Basil Donovan, MD, head of [...]