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Sexually transmitted infections (STIs)—also referred to as sexually
transmitted diseases (STDs)—are those spread by sexual contact. They may also
be spread from a pregnant woman to her fetus before or during delivery.
Exposure to an STI can occur anytime a person has sex or close
contact that involves the genitals, the mouth, or the rectum with another
person, but exposure is more likely if a person has many sex partners or does
not use condoms. STIs can be prevented by not having sexual contact
Most STIs can be treated and cured, but some cannot. Some STIs,
such as HIV and syphilis, can cause death.
Current as of:
March 20, 2017
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & H. Michael O'Connor, MD - Emergency Medicine
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