I think I may have put myself at risk, should I get a test right away?

If you believe you may be at risk it is advised that you get tested as soon as possible. All of the infections we test for have different window periods (the time from exposure to the point at which an accurate result can be achieved). Our tests are highly accurate after the following window periods:

  • Chlamydia: from 2 weeks
  • Gonorrhoea: from 2 weeks
  • HIV: from 4 weeks
  • Syphilis: from 3 months
  • Hepatitis B: from 3 months
  • Hepatitis C: from 3 months


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Sexual Health London offers a free STI testing across most of London.
Simply register with SHL and complete an online consultation to order your free STI test kit.