Youssouf Keita and Ari Johnson


Youssouf Keita and Ari Johnson
Member since:
06 Jun, 2017


Ari Johnson MD is co-founder and CEO of Muso, and Assistant Professor at the University of California San Francisco, Global Health Sciences. A Draper Richards Kaplan Fellow, Ari trained at Harvard Medical School and completed his residency at at the University of California San Francisco. He has conducted research at UCSF, the National Institutes of Health, the International Health Institute, the Medical Research Council of South Africa, Brown University, Harvard University, and the Kuvin Center for the Study of Infectious and Tropical Diseases in Jerusalem. His research focuses include health systems redesign, delays from symptom onset to treatment, CHW performance management, CHW workflow optimization, universal health coverage, reproductive health, and child mortality.

Youssouf Keita MD, Muso's Director of Training, has led Muso's clinical training for Community Health Workers, CHW supervisors, nurses, midwives, and doctors. He led the deployment of Muso's 360 Supervision model for CHW performance management, currently being assessed through a randomized controlled trial. When the 2014 West African Ebola outbreak spread to Mali, Youssouf trained a national team of frontline health workers to monitor hundreds of Malians who had been exposed to the virus, to detect, isolate and treat new cases early--efforts that helped to shut down Mali's Ebola outbreak within three months. He trained at the medical school of the University of Bamako, where he conducted research on telemedicine in rural Mali.


Role(s) / Profession(s)

  • Administrator (CEO, COO, President, Executive)
  • Director (Site, Program, Project)


  • Muso

Work Location(s)

  • Mali

Population(s) Served

  • Children
  • Disabled
  • Homeless
  • Immigrant
  • Migrant
  • Minorities
  • Other vulnerable populations


  • English
  • French