Summary

After years of rising sexually transmitted infection (STI) rates in Australia, new Burnet Institute–led research has found promising evidence that an existing antibiotic taken after sex may be helping to reduce syphilis and chlamydia diagnoses among gay and bisexual men. The study, published in Nature Health , found that syphilis diagnoses were 55% lower and chlamydia diagnoses 36% lower than expected, based on projections of earlier trends, in the 27 months following the introduction of national doxyPEP guidance in September 2023.

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