The incidence risk can be calculated by dividing the total new cases by the population at risk observed at the beginning of observation period.
Incidence risk is a proportional value. It can change as per the occurrence of the disease. More are the cases arriving of the disease, more is its incidence risk. The incidence risk is also compared according to a particular time period.
Population is defined as the group of same individuals that live in the same space, utilize the same resources and are able to breed amongst each other. Population inhabits the individuals of the same species.
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