Prevalence of human papillomavirus (HPV) infections in sexually active adolescents and young women in England, prior to widespread HPV immunisation

► Residual chlamydia screening samples from women <25 years have been tested for HPV. ► Pre immunisation, 18% of 16-24 years old women screened for chlamydia had HPV 16/18 infection. ► 35% of 16-24 years old women screened for chlamydia had high-risk HPV: multiple infections were common. ► HPV prevalence was associated with age during teen years and with sexual behaviour. ► The early impact of HPV immunisation will be measured against these baseline data.