Reproduced from: Centers for Disease Control and Prevention. Diphtheria. In: Epidemiology and Prevention of Vaccine-Preventable Diseases. The Pink Book, 12
th ed, Atkinson W, Wolfe S, Hamborsky J (Eds), Public Health Foundation, Washington, DC 2011. Available at:
www.cdc.gov/vaccines/pubs/pinkbook/downloads/dip.pdf (Accessed on September 12, 2012).
