Paralytic Illness in Ababo ("Ababo")

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Nancy Binkin
Date published
Jan, 2003
Last updated
21 Jan 2020


Development of a surveillance system for polio in a fictitious African country in 1991.


  • Define incidence, prevalence, and case-fatality rate
  • Define surveillance and identify the key features of a surveillance system
  • List the types of information that should be collected on a surveillance case report form
  • List the factors that can account for a change in the reported incidence of a disease
  • Define sensitivity of a surveillance system, and the effect of different case definitions on sensitivity