Training Manual in Combatting Childhood Communicable Diseases Part I (Peace Corps, 1985, 579 pages) |

Module 3: Community analysis and involvement |

Session 13: Survey and disease surveillance |

Incidence Rate |
- In surveillance feedback is a report that interprets the data
collected and is distributed to those who have collected it. The number of new
cases of a specified disease diagnosed or reported during a defined period of
time as the numerator, and the number of persons in a stated population in which
they occur as the denominator. A rate is the average risk of disease in that
time interval. |

Mortality rate |
- A rate calculated in the same way as an incidence rate using as
the numerator the number of deaths occurring in the population during the stated
period of time. |

Prevalence Rate |
- The numerator is the number of persons sick or portraying a
certain condition in a stated population, at a particular time, regardless of
when that illness or condition began, the denominator is the number of persons
in that
population. |