Journal Article
Jenkins, Helen E, Bruce R Aylward, Alex Gasasira, Christl A Donnelly, Emmanuel A Abanida, Titi Koleosho-Adelekan, and Nicholas C Grassly.
"Effectiveness of immunization against paralytic poliomyelitis in Nigeria." New England Journal of Medicine 359, no. 16 (2008): 1666-1674.