A Sexually Transmitted Infection (STI) is an infection which is transferred through direct sexual contact (oral, anal, vaginal, but also potentially through objects like sex toys). Some STIs infect your sexual and reproductive organs (like chlamydia and gonorrhoea), while others may cause general body infection (like HIV and hepatitis B). Note that even though condoms protect against many STIs, they do not protect against all STI's.
All young people worldwide should be able to explore, experience and express their sexualities in healthy, pleasurable and safe ways.