| seroprevalence of human papillomavirus 6, 11, 16, and 18 in young primiparous women in sao paulo, brazil. | data on epidemiology of hpv infection are needed for the development of human papillomavirus (hpv) vaccine recommendations, especially in countries where hpv vaccination is not yet included in public vaccination programs. the aim of this study was to determine the prevalence of serum antibodies to hpv types 6, 11, 16, and 18 and associated factors among young women after birth of the first child. | 2010 | 21051985 |