shortened to STI, and previously commonly referred to as a sexually transmitted disease. STIs are infections that are commonly spread through sexual activity, particularly vaginal, anal and oral sex, and are either bacterial STIs, viral STIs or parasitic STIs.

Many STIs do not have immediate symptoms, which means they can be at risk of being passed on to others as the carrier may not be aware they have an STI. Signs and symptoms of an STI may include vaginal or penile discharge, ulcers around or on the genitals and pelvic pain.

If left untreated, STIs can cause serious health complications and can also be passed onto infants before or during childbirth.

As a result, it is important to practice safe sex.