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QUESTION
A population of 1,000 people is monitored for a year for the development of measles. No one has measles at the start of the investigation.
A population of 1,000 people is monitored for a year for the development of measles. No one has measles at the start of the investigation. Thirty people develop measles on June 30 and twenty people develop measles on September 30. Eight people are lost to follow-up on March 31 and twenty-four people are lost to follow-up on November 30. None of those lost to follow-up had developed measles prior to becoming lost. Assume that you can only get measles once.
- What is the cumulative incidence of measles in this population?
- What is the incidence rate of measles?
- What is the prevalence of measles on July 1?
