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

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

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Dr. John-Stewart's major research interest focuses on advancing HIV prevention and treatment. She directs studies aimed at defining mechanisms of HIV transmission from mothers to infants, HIV prevention in women, and pediatric/adolescent HIV. Particular research interests include prevention of mother-to-child HIV transmission (PMTCT) clinical trials, implementation science and evaluation studies, pediatric HIV studies, HIV treatment programs and evaluation. Her group also focuses on maternal-child epidemiologic studies in the context of infectious diseases including studies of the mechanism of breastfeeding protective effects, child growth and neurocognitive outcomes, preterm birth, viral infections with EBV, CMV, STIs, and TB.

  • BS (University of Michigan)
  • MD (University of Michigan)
  • MPH (University of Washington)
  • PhD (University of Washington)
Country Affiliations 
Health Topics 
  • Child and Adolescent Health (incl. Pediatrics)
  • Child Mortality
  • HIV Transmission
  • Infectious Diseases
  • Infectious Diseases (other than STDs)
  • Maternal Child Health (incl. Reproductive Health)
  • Mobile Health (mHealth)
  • STDs (other than HIV)
  • TB

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.

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.

Richardson B, John-Stewart G, Emery V, Atkinson C, Nduati R, Asbjornsdottir K, Overbaugh J, Boekh M, Slyker J. Vertical cytomegalovirus transmission from HIV-infected women randomized to formula feeding versus breastfeeding. J Infect Dis. 2015 Oct 30. 6 (992-8). PMID: 26518046

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.

Njuguna I, Cranmer L, Otieno V, Mugo C, Okinyi H, Benki-Nugent S, Richardson B, Stern J, Maleche-Obimbo L, Wamalwa D, John-Stewart G. Urgent versus post-stabilization antiretroviral treatment in hospitalized children: a randomised trial. Lancet HIV 2018; 5(1):e12-e22.doi:10.106/S2352-3018 (17) 30167-4. PMID:29150377.