Sexually Transmitted Infections (STIs) are infections that are passed on from an infected partner(s) during unprotected sex (vaginal, anal and oral). They are caused by specific bacteria and viruses. In some cases, you may be at risk even if you don’t have full sex. Kissing and touching each other’s genitals may pass on some STIs. Some people refer to STIs as STDs or sexually transmitted diseases.
There are many different STIs – some are more common than others. Most can be cured with medication. However, some of them can only be treated to reduce symptoms but will stay in your system once you have been infected.