[HPV and effectiveness of chlamydia control].

Liberalization of sexual behaviour has brought about an increased outcome of the most common sexually transmitted diseases in people under 25 years, such as infections caused by chlamydia and carcinogenic human papillomaviruses (HPV) as well as their severe complications such as infertility and cancers of the anogenital region in those at the reproductive age. HPV vaccination and screenings are new possibilities for the control of these infections and their consequences. The herd immunity raised by vaccinating can protect as many as 25% of non-vaccinees as well. Screenings of birth cohorts of vaccinees aim to break the transmission chain of chlamydia.