STD Clinic

How soon after exposure can I get an STD test? STD clinic in Seoul, Korea

The short answer

For chlamydia and gonorrhea, PCR swabs are usually reliable from about 1–2 weeks after exposure. Blood tests for HIV and syphilis need longer, often several weeks to a few months, depending on the test. If you test early, your doctor may advise a repeat test later. Come in sooner if you have symptoms.

Every test has a 'window period' between infection and when it can be detected.

  • Chlamydia, gonorrhea, trichomonas, Mycoplasma: swab PCR, often reliable after about 1–2 weeks
  • HIV: modern combined tests detect most infections within about 6 weeks; a later confirmatory test may be advised
  • Syphilis: blood tests may take several weeks to turn positive

Possible emergency contraception needs are time-sensitive too; see emergency contraception. Your doctor will plan test timing with you; see how to prepare for an STD test.

Answered by Dami Women's Clinic (다미산부인과의원), Yeouido, Seoul · Dr. Ko Sang-hyun, OB/GYN. General information, not a diagnosis. Emergencies in Korea: call 119. Medical disclaimer · International Patient Center