• Professor, Global Health
  • Professor, Allergy and Infectious Dis.
  • Professor, Epidemiology
  • Professor, Pediatrics
Photo of Grace John-Stewart

Global Center for Integrated Health of Women, Adolescents and Children (Global WACh)
Kenya Research and Training Center
325 9th Avenue, Box 359909
Seattle, WA 98104
United States

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Dr. Grace John-Stewart is a Professor of Global Health, Medicine, Epidemiology, and Pediatrics at the University of Washington. Her interests include prevention of mother-to-child transmission of HIV (PMTCT), improving outcomes for children with HIV, and addressing relevant co-infections that affect women and children with HIV (including TB, pneumonia, diarrhea, CMV).  Dr. John-Stewart has published over 225 peer-reviewed articles. Her research is based in Kenya and includes molecular epidemiologic studies, clinical trials, implementation science studies, and program evaluations focused on HIV and maternal child health. She received the Elizabeth Glaser Scientist Award for research on mother-to-child transmission of HIV. Dr. John-Stewart has mentored numerous trainees, received a K24 Mentorship Award, and received a UW School of Medicine mentorship award. She is the Director of the UW CFAR International Core and the UW Global Center for Integrated Health of Women, Adolescents and Children (Global WACh).

  • BS (University of Michigan)
  • MD (University of Michigan)
  • MPH (University of Washington)
  • PhD (University of Washington)
Country Affiliations 
Health Topics 
  • Maternal Child Health (incl. Reproductive Health)

molecular epidemiology, clinical trials, HIV research, MCH, HIV co-infections (TB, CMV, EBV)


Nduati R, John G, Mbori-Ngacha D, Richardson B, Overbaugh J, Mwatha A, Ndinya-Achola J, Bwayo J, Onyango FE, Hughes J, Kreiss J. Effect of breastfeeding and formula feeding on transmission of HIV-1: A randomized clinical trial. JAMA 2000;283:1167-1174.

Jonnalagadda S, Lohman-Payne B, Brown E, Wamawa D, Obimbo E, Farquhar C, Otieno P, Mbori-Ngacha D, John-Stewart G. Latent tuberculosis detection by interferon gamma release assay during pregnancy predicts active tuberculosis and mortality in human immunodeficiency virus type 1-infected women and their children. J Infect Dis 2010 Dec 15;202(12):1826-35. Epub 2010 Nov 10. PMCID: PMC3058232

Walson JL, Singa BO, Sangaré L, Naulikha J, Piper B, Richardson BA, Otieno PA, Mbogo LW, Berkley J, John-Stewart G. Randomized trial of empiric deworming to delay HIV-1 disease progression in ART-ineligible individuals. Lancet Infect Dis 2012 Dec;12(12):925-32. Epub 2012 Sep 10.

Drake A, Wagner A, Richardson B, John-Stewart G. Incident HIV During Pregnancy and Postpartum and risk of mother-to-child HIV transmission: A Systematic Review and Meta-Analysis. PLoS Medicine 2014, Feb 25;11(2):e1001608. doi: 10.1371/journal.pmed.1001608. eCollection 2014 Feb. Review. PMID: 24586123

Polyak C, Yuhas K, Singa B, Khaemba M, Walson J, Richardson B, John-Stewart G. Cotrimoxazole prophylaxis discontinuation among antiretroviral-treated HIV-1 infected adults: a randomized non-inferiority trial. PLoS Med 2016 Jan 5;13(1):e1001934. doi:10.1371/journal.pmed.1001934. eCollection 2016 Jan.PMID: 26731191