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3. Sexually transmitted disease (STD) symptoms - Mayo Clinic

   Sexually transmitted diseases are infections spread mainly by contact with genitals or bodily fluids. Also called STDs, STIs or venereal disease, ...

4. Sexually transmitted diseases (STDs) - Diagnosis and treatment - Mayo Clinic

   Testing for an STD or sexually transmitted infection in someone who doesn't have symptoms is called screening. Most of the time, STI screening is not a routine ...

5. Syphilis - Symptoms and causes - Mayo Clinic

   Syphilis is an infection caused by bacteria. Most often, it spreads through sexual contact. The disease starts as a sore that's often painless and typically ...