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What is a Sexually Transmitted Infection (STI)? | Print |

An STI is an infection passed during sexual contact.

  • Some STIs infect only your sexual and reproductive organs. Others (HIV, hepatitis B, syphilis) cause general body infections.
  • Sometimes you can have an STI with no signs or symptoms. Or the symptoms may go away. Either way, you still have the STI until you get treated.
  • STI is spread during vaginal, anal and oral sex, and sometimes by genital touching.
  • Some STI s (HIV and hepatitis B) are also spread by contact with infected blood.
  • STI germs need to live in warm, moist areas. That's why they infect the mouth, rectum and sex organs (vagina, vulva, penis and testes).



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