Incidence refers to the number of cases of a disease that exist at some given point in time.
Incidence is used to measure the rate of occurrence disease that allows us to determine if an individual is having a disease.
The individual is a diagnose over a given period period of time. The rate of the disease with respect to a given time is recorded as incidence.
Therefore, incidence refers to the number of cases of a disease that exist at some given point in time.
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