Sexually Transmitted Diseases (STD) also knows as Sexually Transmitted Infections (STI) is caused by an organism (bacteria, virus, or parasite) that can be passed from one person to another during an intimate contact or sex.
Most STIs are passed (or transmitted) between sexual partners through unprotected oral, vaginal (frontal) or anal sex. Some STIs are passed by skin-to-skin contact. Therefore, using a barrier contraction such as condoms and other barriers for vaginal (frontal), oral and anal sex is a good way to lower the chances of passing many STIs.
Some STIs can cause serious health problems if left untreated.
Some examples of diseases that can be sexually transmitted from one person to another, include but not limited to: