STIs are particularly common among young people, with health experts saying testing for them is vital.

Sexually transmitted infections, or STIs, include both sexually transmitted diseases, known as STDs, and the many infections that don’t progress to disease. STIs are caused by more than 30 different ...

Chlamydia often has no noticeable symptoms. If symptoms do appear, they usually do so between 7–21 days after exposure. Tests can usually detect chlamydia 1–2 weeks after exposure. The time between a ...