People often use the terms STD and STI interchangeably, and often this doesn’t create much confusion, but it’s essential to be clear about what each term means. STI stands for sexually transmitted infection, and STD stands for sexually transmitted disease.
An STD results from an STI. It’s a subtle difference, and the nomenclature hasn’t entirely settled with the average citizen. Even the sites we review here prefer STD for clarity. That’s why we decided to stick with STD over STI. STD is the clearer choice at this point, even if it’s technically less accurate.