However, there are more than 30 sexually transmitted infections. STIs are passed from one person to another through vaginal, oral, or anal intercourse, or other intimate contact. Certain STIs can be passed from a woman to her fetus during pregnancy and birth.
Nobody is immune to STIs.
They can damage a person's health permanently without showing any symptoms. Millions of people don't even know they're infected until serious and often permanent damage has occurred. Most STIs can have dangerous consequences and require professional medical care. However, most can also be managed or cured with medication. People who aren't treated and cured may never be able to have children.