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HIV and Sexually Transmitted Infections (STIs) may have consequences for the individual person and society. Infections can be prevented by dissemination of knowledge, testing, guidance and by supporting behavioural changes when necessary.

Gonorrhoea is increasing among young adults and chlamydia infection is common among young women and men in Sweden. By participating in this study, you help us understand risk factors and develop better prevention efforts. Your participation is voluntary, anonymous, and does not require any

The Public Health Agency of Sweden is an independent public authority under the Swedish Government. We work to ensure good public health and to ensure that the population is protected against communicable diseases and other health threats.