Faculty

Judd L Walson

Affiliate Professor, Epidemiology
Affiliate Professor, Global Health

206-612-4571

Education

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

Contact

206-612-4571

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

Bio

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)

Impact of macrolide resistance on azithromycin for prevention of rehospitalization or death among children discharged from hospitals in Western Kenya.
(2025 Apr 21)
J Infect Dis
Mogeni P, Ochieng JB, Atlas HE, Tickell KD, Rwigi D, Kariuki K, Aluoch LR, Sonye C, Apondi E, Ambila L, Diakhate MM, Singa BO, Liu J, Platts-Mills JA, Fang FC, Walson JL, Houpt ER, Pavlinac PB

Safety profile of self-amplifying mRNA SARS-CoV-2 vaccine ARCT-154 in adults: a pooled phase 1/2/3 randomized clinical study.
(2025 Dec)
Expert Rev Vaccines 24(1): 299-312
Ho NT, Smolenov I, Thi Le Tran L, Nguyen VT, Ta VT, Nguyen TV, Pham HN, Van Pham AT, Luong QC, Van Chu M, Ngoc Dang MT, Nguyen TT, Le VTT, Trinh QV, Van Nguyen T, Nguyen AN, Pham HT, Dao GD, Baccarini C, Nnah E, Hawkes A, Parker S, Verhoeven C, Walson JL, Nguyen XH

School-based deworming programmes: Knowledge and perceptions regarding soil-transmitted helminth infections among schoolteachers in Tamil Nadu, India.
(2025)
PLOS Glob Public Health 5(3): e0004319
Aruldas K, Ramesh RM, Prasad S, Israel GJ, Legge H, Walson JL, Means AR, Ajjampur SSR

Strengthening the paediatric clinical trial ecosystem to better inform policy and programmes.
(2025 Apr)
Lancet Glob Health 13(4): e732-e739
Berkley JA, Walson JL, Gray G, Russell F, Bhutta Z, Ashorn P, Norris SA, Adejuyigbe EA, Grais R, Ogutu B, Zhang J, Chantada GL, Nachman S, Kija E, Jehan F, Giaquinto C, Rollins NC, Penazzato M

Catastrophic expenditure associated with childhood hospitalisation for acute illness in Kenya and Uganda: a cross-sectional study.
(2025 Jan)
BMJ Public Health 3(1): e001173
Jemutai J, Njuguna RG, Laurence YV, Murunga S, Ogwang C, Mwaringa S, Mwalekwa L, Timbwa M, Paasi G, Olupot-Olupot P, Juma M, Thitiri J, Ngao N, Singa B, Mukisa J, Mupere E, Lancioni C, Sukhtankar P, Tickell KD, Fakhar Uddin M, Molyneux S, Walson JL, Vassall A, Berkley J

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