Inclusion/Exclusion Criteria

Inclusion Criteria:

  • Either;
    • have received a positive Chlamydia or gonorrhoea test result or have been diagnosed with NSU in the last 2 weeks
    • OR have started treatment for Chlamydia, gonorrhoea, or NSU in the last 2 weeks
  • own a personal mobile phone
  • be aged 16 to 24 (according to clinic data)
  • be able to provide informed consent (patients who lack mental capacity and those unable to understand English will not be recruited)

Exclusion Criteria:

  • known to be a sexual partner of someone already recruited to the trial.