Judd L Walson

Affiliate Professor, Epidemiology
Affiliate Professor, Global Health



MPH Tufts University, 2000
BA Anthropology, Pitzer College, 1993
MD Tufts University, 2000



Johns Hopkins University
Office Room E8527
615 N. Wolfe Street
Baltimore, MD 21205


Dr. Walson is chair of the Department of International Health at the Bloomberg School and the inaugural Robert E. Black Chair in International Health. Walson is a physician trained in Internal Medicine, Pediatrics, and Infectious Diseases with extensive experience working in research, public health programming, policy development, product development, and clinical practice. His research focuses on interventions to improve child survival, growth, and development in Africa and South Asia. He collaborates with ministries of health, NGOs, and academic partners in Bangladesh, Benin, Burkina Faso, India, Kenya, Malawi, Nepal, Pakistan, Thailand, and Uganda. Walson has conducted numerous trials investigating poor nutrition and infectious diseases to inform improvements in policy and programs globally. He has also worked in product development across vaccines, diagnostics, and devices.

He co-leads the Childhood Acute Illness and Nutrition (CHAIN) Network, a collaboration of experts working at institutions across sub-Saharan Africa and South Asia. The studies conducted under the network have led to the development of strategies to reduce mortality among acutely ill children. The research has also led to novel approaches enabling risk-differentiated care, ensuring those at highest risk are supported adequately both during and after contact with the health system. He also leads the DeWorm3 study—a large community cluster randomized trial focused on eliminating soil-transmitted helminths that has enrolled over 360,000 individuals in Benin, Malawi, and India. These intestinal parasites include roundworm and hookworm and are among the most common causes of infections in humans, disproportionately impacting communities living in poverty.

Research Interests

Child and Adolescent Health; Child Mortality; Diarrheal Diseases; Epidemiology; Global Health; Infectious Diseases; Malaria; Maternal Child Health; Neglected Diseases; Tropical Medicine

Recent Publications (PubMed)

Prevalence of functional difficulty among school-aged children and effect on school enrolment in rural southern India: A cross-sectional analysis.
(2024 Apr 22)
Res Sq
Chandy BR, Davey C, Oswald WE, Kaliappan SP, Aruldas K, Banks LM, Jasper S, Nagarajan G, Galagan S, Kennedy DS, Walson JL, Koshy B, Ajjampur SS, Kuper H

Phenotypic and molecular characterization of ╬▓-lactamase-producing Klebsiella species among children discharged from hospital in Western Kenya.
(2024 Apr 23)
BMC Microbiol 24(1): 135
Rwigi D, Nyerere AK, Diakhate MM, Kariuki K, Tickell KD, Mutuma T, Tornberg SN, Soge OO, Walson JL, Singa B, Kariuki S, Pavlinac PB, Mogeni P

Clinical and nutritional correlates of bacterial diarrhoea aetiology in young children: a secondary cross-sectional analysis of the ABCD trial.
(2024 Apr 11)
BMJ Paediatr Open 8(1):
Somji S, Ashorn P, Manji K, Ahmed T, Chisti M, Dhingra U, Sazawal S, Singa B, Walson JL, Pavlinac P, Bar-Zeev N, Houpt E, Dube Q, Kotloff K, Sow S, Yousafzai MT, Qamar F, Bahl R, De Costa A, Simon J, Sudfeld CR, Duggan CP, ABCD Study Group

Childhood growth during recovery from acute illness in Africa and South Asia: a secondary analysis of the childhood acute illness and nutrition (CHAIN) prospective cohort.
(2024 Apr)
EClinicalMedicine 70(): 102530
Bourdon C, Diallo AH, Mohammad Sayeem Bin Shahid AS, Khan MA, Saleem AF, Singa BO, Gnoumou BS, Tigoi C, Otieno CA, Oduol CO, Lancioni CL, Manyasi C, McGrath CJ, Maronga C, Lwanga C, Brals D, Ahmed D, Mondal D, Denno DM, Mangale DI, Chimwezi E, Mbale E, Mupere E, Salauddin Mamun GM, Ou├ędraogo I, Berkley JA, Njunge JM, Njirammadzi J, Mukisa J, Thitiri J, Walson JL, Jemutai J, Tickell KD, Shahrin L, Mallewa M, Hossain MI, Chisti MJ, Timbwa M, Mburu M, Ngari MM, Ngao N, Aber P, Harawa PP, Sukhtankar P, Bandsma RHJ, Bamouni RM, Molyneux S, Mwaringa S, Shaima SN, Ali SA, Afsana SM, Banu S, Ahmed T, Voskuijl WP, Kazi Z

Adolescents' Perspective Regarding a Community-Wide Mass Drug Administration Program for Soil-Transmitted Helminths in India.
(2024 Apr 3)
Am J Trop Med Hyg 110(4): 681-686
Aruldas K, Johnson J, Saxena M, Titus A, Roll A, Ramesh RM, Walson JL, Means AR, Ajjampur SSR

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