Sexually Transmitted Infections Introduction:
A sexually transmitted infection (STI; formerly called sexually transmitted disease or STD) is caused by a virus, parasite, fungus, or bacterium that can be passed from one person to another through intimate or sexual contact. There are nearly 30 STIs in the world. Some can be cured, and some can only be treated by not cured. This channel provides important information about the most common STIs, including testing issues and how to manage a relationship in which an incurable STI is present.