Dr Darrell H S Tan, MD PhD FRCPC
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darrelltan.bsky.social
Dr Darrell H S Tan, MD PhD FRCPC
@darrelltan.bsky.social
ID doc and Clinician-Scientist at St Michael’s Hospital; Associate Professor at University of Toronto; Canada Research Chair in Biomedical HIV/STI Prevention; PI of www.optionslab.ca; caring human.
Proud to announce on World AIDS Day today that our 2025 update to Canadian guideline on HIV PrEP and PEP is now published in @cmaj.ca! The guideline include 31 recommendations and 10 good practice statements to support clinical decision making.

Learn more 👉 doi.org/10.1503/cmaj...
December 1, 2025 at 2:16 PM
Fresh from the podium at EACS 2025 in Paris: Doxycycline PEP was associated with a sustained positive impact on syphilis and chlamydia incidence but also increases in gonorrhea AMR in the open label extension of the DoxyVAC trial among GBM in France.
October 17, 2025 at 12:08 PM
Dr Cissy Kityo highlighted the role of long-acting drugs for treating HIV in LMICs in this morning’s excellent plenary at #IAS2025, buoyed by yesterday’s announcement of the Viiv/MPP updated voluntary licensing agreement for CAB and updated WHO guidelines supporting CAB/RPV as a treatment option.
July 15, 2025 at 8:17 AM
Honoured to have been asked by Dalhousie’s Division of Infectious Diseases to give the TJ Marrie lecture on “Mpox then and now: lessons learned from a re-emerging infectious disease” at the 2025 Research Day recently! Plus, inspiring presentations from students and the Cdn Centre for Vaccinology.
May 3, 2025 at 10:21 AM