What is the difference between an STI and an STD?
A sexually transmitted infection (STI) is the infection, the entering of the bacterium, virus, or parasite into the human body (host). When symptoms appear it is called a sexually transmitted disease (STD). A person may have no symptoms and have an STI, while a person with an STD can’t (STDs have symptoms). In short, everyone who has an STD also has an STI, but not everyone who has an STI has an STD – because not everyone has symptoms.
