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.