William John Moss

William John Moss is a Professor in the Department of Epidemiology at the Johns Hopkins Bloomberg School of Public Health, where he also holds joint appointments in International Health and Molecular Microbiology and Immunology. He serves as Executive Director of the International Vaccine Access Center (IVAC) and Deputy Director at the Johns Hopkins Malaria Research Institute. His work spans multiple centers including the Center for Global Health, Center for Humanitarian Health, and Johns Hopkins Vaccine Initiative.

Dr. Moss earned his MD from Columbia University in 1984 and his MPH in 1995. As a pediatrician with subspecialty training in infectious diseases, he has conducted extensive field research across multiple countries including Ethiopia, Kenya, South Africa, Zambia, Zimbabwe and India.

His research focuses on the epidemiology and control of childhood infections in resource-poor settings, with particular emphasis on measles-HIV interactions, malaria transmission in southern Africa, serosurveillance for immunization programs, and care of HIV-infected children in rural Zambia. His recent work (2024-2025) demonstrates continued focus on measles epidemiology, malaria transmission dynamics, and vaccine implementation research, with numerous publications examining immunity gaps, human mobility patterns, and malaria vector biology in African settings.

Scientific Awards:

• Wyeth-Lederle Vaccines and Pediatrics Young Investigator Award in Vaccine Development (1999-2001)
• Gustave J. Martin Innovative Research Fund Fellow (2001)
• Advising, Mentoring and Teaching Recognition Award (2007-2008)

Dr. Moss leads multiple research projects including studies on HIV-infected children's immune reconstitution, malaria transmission dynamics in southern Zambia, and strengthening immunization systems through serosurveillance. His work bridges clinical medicine, epidemiology, and public health policy to address critical challenges in global infectious disease control.