Epidemiology and Prevention of Vaccine-Preventable Diseases, 11th Edition (The Pink Book): Poliomyelitis; p. 232
Editors: Atkinson W, Wolfe S, Hamborsky J, McIntyre L
Washington, D.C.: Public Health Foundation; 2009
Source: Centers for Disease Control and Prevention
Reference to the CDC Pink Book 11th Edition does not constitute endorsement or recommendation by the U.S. Government, Department of Health and Human Services, or Centers for Disease Control and Prevention. The CDC Pink Book 11th Edition may otherwise be available on the agency website for no charge.