Sexually Transmitted Diseases Health Center
Table of Contents
STDs are caused by viruses, bacteria or parasites. They are usually — but not always — spread through oral, vaginal or anal sexual contact. Do not assume that you are not at risk for STDs just because you are not having traditional sexual intercourse.
Some STDs can spread from mother to baby during birth or through breastfeeding. Some STDs also can be passed along through sharing needles.