Biography

Dr. Ann Burchell is Research Director at the Department of Family and Community Medicine and Scientist at the MAP Centre for Urban Health Solutions at St. Michael’s Hospital, Toronto. She is a Canada Research Chair in Sexually Transmitted Infection Prevention. She holds degrees in epidemiology from the University of Toronto (MSc) and McGill University (PhD) and has academic appointments as Associate Professor, Department of Family and Community Medicine, Faculty of Medicine, and Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto; Adjunct Professor, Division of Cancer Epidemiology, McGill University; and Adjunct Scientist, Institute for Clinical Evaluative Medicine, Toronto.

Dr. Burchell’s research program focuses on the epidemiology of human immunodeficiency virus (HIV) infection, human papillomavirus (HPV), syphilis, and other sexually transmitted infections (STIs). Its goal is to generate evidence for effective and practical strategies to prevent STIs and STI-related cancers in high-risk populations, including people living with or at risk for HIV.

She has extensive methodological experience in the design and implementation of: observational longitudinal studies with primary and secondary data; sexual behaviour and health-access questionnaires; natural history studies using laboratory markers of infection; and pragmatic randomized trials for HPV prevention and improved screening for syphilis, cervical and anal cancer. She currently holds a Foundation Grant from the Canadian Institutes of Health Research.

Visit the Estimate Lab website.

Recent Publications

  1. Grewal, R, Lau, C, Kwong, JC, Burchell, AN, Friedman, L, Navarro, C et al.. Characteristics of individuals who received a complete, 2-dose mpox vaccine regimen as part of the public health response to the mpox epidemic in Ontario, Canada. PLOS Glob Public Health. 2025;5 (11):e0005452. doi: 10.1371/journal.pgph.0005452. PubMed PMID:41296795 PubMed Central PMC12654912.
  2. Xi, M, Bullock, S, Mendelsohn, JB, Moravan, V, Burchell, AN, Tan, DHS et al.. The impact of Undetectable=Untransmittable and viral suppression on condomless sex among mixed HIV-status couples in Canada. PLoS One. 2025;20 (10):e0332926. doi: 10.1371/journal.pone.0332926. PubMed PMID:41066441 PubMed Central PMC12510518.
  3. Middeldorp, M, Donken, R, Nirmal, A, Smith, B, Citlali Marquez, A, Bettinger, JA et al.. Quadrivalent HPV Vaccine Evaluation Study with Addition of the Nonavalent Vaccine (QUEST-ADVANCE): protocol of an observational cohort study. BMJ Open. 2025;15 (9):e100560. doi: 10.1136/bmjopen-2025-100560. PubMed PMID:41027698 PubMed Central PMC12506106.
  4. Kassam, P, Laurie, C, El-Zein, M, Tota, JE, Tellier, PP, Coutlée, F et al.. Impact of HPV vaccination on the incidence and clearance of HPV infections in sexually active young women. Vaccine. 2025;63 :127632. doi: 10.1016/j.vaccine.2025.127632. PubMed PMID:40850293 .
  5. Mbuagbaw, L, Logie, CH, Thabane, L, Smaill, F, Smieja, M, Burchell, AN et al.. The association between HIV drug resistance testing, viral suppression and mortality in Ontario: a retrospective cohort study. HIV Med. 2025;26 (10):1550-1561. doi: 10.1111/hiv.70086. PubMed PMID:40741698 PubMed Central PMC12497924.
  6. Freitas, C, Cooper, CL, Kroch, AE, Moineddin, R, Arbess, G, Benoit, AC et al.. COVID-19 vaccine uptake in a retrospective population-based cohort of people living with and without HIV in Ontario, Canada. Vaccine. 2025;61 :127422. doi: 10.1016/j.vaccine.2025.127422. PubMed PMID:40602344 .
  7. Lazor, T, Sanches, M, Wardell, JD, Wang, W, Burchell, AN, Margolese, S et al.. Cannabis Use Trajectories Among People Living With HIV in the Decade Prior to Recreational Legalization in Ontario, Canada (2008-2017). AIDS Educ Prev. 2025;37 (2):142-159. doi: 10.1521/aeap.2025.37.2.142. PubMed PMID:40323672 .
  8. Mokaddam, M, Kronfli, N, Sheehan, NL, Gonzalez Reyes, A, Dubuc, D, Loutfy, M et al.. Antiretroviral therapy use, self-reported adherence, and viral suppression among women living with HIV in Canada. HIV Med. 2025;26 (7):1060-1073. doi: 10.1111/hiv.70034. PubMed PMID:40317972 PubMed Central PMC12210344.
  9. Burchell, AN, Grennan, T. DoxyPEP open-label extension: well done is better than well said. Lancet Infect Dis. 2025;25 (8):830-832. doi: 10.1016/S1473-3099(25)00146-X. PubMed PMID:40147464 .
  10. Moore, A, El-Zein, M, Burchell, AN, Tellier, PP, Coutlée, F, Franco, EL et al.. Genital, Oral, and Anal Type-specific Human Papillomavirus Concordance within Individuals and between Partners. Cancer Epidemiol Biomarkers Prev. 2025;34 (6):850-859. doi: 10.1158/1055-9965.EPI-24-1843. PubMed PMID:40146019 .
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Affiliations & Other Activities

  • Associate Professor, Dalla Lana School of Public Health, University of Toronto,
  • Associate Professor, Department of Family and Community Medicine, University of Toronto