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  1. Sexually transmitted infection - Wikipedia

  2. Sexually transmitted diseases (STDs) - Symptoms and causes

  3. STI - Wikipedia

  4. CDC - STD Diseases & Related Conditions

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

  6. Sexually transmitted infections (STIs) - World Health Organization

  7. Sexually Transmitted Infections - Cleveland Clinic

  8. Sexually transmitted diseases (STDs) - Mayo Clinic

  9. Sexually Transmitted Diseases - Information from CDC

  10. STI Treatment Guidelines - Centers for Disease Control and Prevention