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2 September, 18:37

Number of new chronic bronchitis cases due to air pollution occurring between January 1 and June 30, 2012 = 26 Number of active chronic bronchitis cases due to air pollution according to the city register on June 30, 2012 = 264 Find the incidence rate per 100,000 population of chronic bronchitis cases for the 6 months period.

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  1. 2 September, 18:47
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    Incidence rate=0.00026

    Step-by-step explanation:

    Incidence rate is the rate of new occurrence of a particular disease divided by the population of people at risk of the disease. so for this question

    The new cases = 26

    Population at risk = 100,000

    Incidence rate = 26/100,000

    = 0.00026
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