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Sexually transmitted infections can cause severe damage to your bodyâeven death. Except for colds and flu, STIs are the most common contagious (easily spread) infections in the United States, with millions of new cases each year. Although some STIs can be treated and cured, others cannot.
Chlamydia, which strikes over 4 million Americans a year, is the most common bacterial sexually transmitted disease (STD) in the U.S. Scientists believe it's twice as common as gonorrhea and 30 times as common as syphilis. The good news is that chlamydia is easily cured by antibiotics.