Sexually transmitted disease, also called STD, is an infection transmitted through sexual contact, caused by bacteria, viruses or parasites. Most common types are:

Human papillomavirus infection

An infection that causes warts in various parts of the body, depending on the strain.

Genital herpes

A common sexually transmitted infection marked by genital pain and sores.


A common, sexually transmitted infection that may not cause symptoms.


A sexually transmitted bacterial infection that, if untreated, may cause infertility.


HIV causes AIDS and interferes with the body’s ability to fight infections.


A bacterial infection usually spread by sexual contact that starts as a painless sore.