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)

Antimicrobial Usage Among Acutely Ill Hospitalized Children Aged 2‒23 Months in Sub-Saharan Africa and South Asia.
(2025 Sep)
Open Forum Infect Dis 12(9): ofaf487
Tigoi C, Bourdon C, Ngari M, Musyimi R, Timbwa M, Mwaringa S, Ngao N, Maronga C, Mburu M, Ndirangu A, Arif F, Kazi Z, Ejaz MS, Saleem AF, Singa BO, Mupere E, Shahid ASMSB, Khan AF, Chisti MJ, Ahmed T, Lancioni C, Diallo A, Voskuijl W, Bandsma RH, Tickell KD, Sukhtanar P, Walson JL, Stoesser N, Berkley JA

Immunogenicity and safety of self-amplifying mRNA COVID-19 vaccine (ARCT-2303), with or without co-administration of seasonal inactivated influenza vaccine in adults: a phase 3, randomised, controlled, observer-blind, multicentre study.
(2025 Sep)
EClinicalMedicine 87(): 103428
Giles ML, Tabora C, Baccarini C, Barrientos L, Vargas JC, Montellano ME, Nguyen P, Deshmukh S, Neville M, Hohenboken M, van Boxmeer J, Jin H, Bugarini R, Liu X, Walson JL, Verhoeven C, Smolenov I

Access and Awareness of Morbidity Management and Disability Prevention for Lower Limb Lymphatic Filariasis in Post-Mass Drug Administration Districts in Southern India.
(2025 Oct 1)
Am J Trop Med Hyg 113(4): 839-843
Jog A, Deborah AA, Ramesh RM, Aruldas K, Baskaran Y, Walson JL, Krishnasastry S, Ajjampur SSR

Feasibility of interrupting the transmission of soil-transmitted helminths: the DeWorm3 community cluster-randomised controlled trial in Benin, India, and Malawi.
(2025 Aug 2)
Lancet 406(10502): 475-488
Ajjampur SSR, Aruldas K, Ásbjörnsdóttir KH, Avokpaho E, Bailey R, Cottrell G, Galagan SR, Halliday KE, Houngbégnon P, Ibikounlé M, Israel GJ, Kaliappan SP, Kalua K, Legge H, Littlewood DTJ, Luty AJF, Manuel M, Massougbodji A, Means AR, Oswald WE, Pilotte N, Pullan R, Ramesh RM, Samikwa L, Simwanza J, Thomas KK, Williams SA, Witek-McManus S, Walson JL, DeWorm3 Trials Team

Is rotavirus aetiology in young children with acute diarrhoea associated with sociodemographic and clinical factors, including rotavirus vaccination status? A secondary cross-sectional analysis of the ABCD trial.
(2025 Jul 27)
BMJ Glob Health 10(7):
Somji S, Sudfeld CR, Duggan C, Manji K, Ahmed T, Chisti MJ, Dhingra U, Sazawal S, Singa B, Walson JL, Pavlinac PB, Bar-Zeev N, Houpt E, Dube Q, Kotloff KL, Sow SO, Yousafzai MT, Qamar FN, Bahl R, De Costa A, Simon JL, Ashorn P, ABCD Study Group

Show complete publication list