Sexually transmitted diseases (STDs) are infectious diseases that are spread through sexual contact. STDs are among the most common infectious diseases in the world today. There are over 20 types, affecting more than 13 million men and women in the United States each year. Some of the most common STDs include chlamydia infection, genital herpes, genital warts, gonorrhea, HIV (human immunodeficiency virus, the microorganism that causes AIDS), and syphilis.
The Center for Public Health provides free, confidential screening and treatment for anyone over the age of 13.