Sexually transmitted infection (STI) and sexually transmitted disease (STD) are both terms used to refer to an infection spread through sexual activities.
Recently, STI has become the preferred term for many individuals. Why? Sexually transmitted infection is more accurate because even though select infections can eventually develop into diseases, most do not. The move away from STD is also due to the stigma associated with the word disease and efforts to normalize talking about these infections. However, since both terms remain widely used, we included STI and STD in our test name.