The incidence rate of influenza cases per week is 180 cases/1000
The incidence rate is the number of new cases of a disease per unit of time, usually expressed as cases per 1000 people per week. To calculate the incidence rate in this scenario, we need to first calculate the total number of new cases reported over the 3 weeks.
This can be done by adding the number of cases reported each week: 30 + 50 + 100 = 180. This is the numerator of our equation.
For the denominator, we need to know the population size. Assuming a population of 1000 people, the denominator will be 1000.
Therefore, we can calculate the incidence rate as follows:
Incidence Rate = (180 cases/1000 people) x (1 week/1 week)
Incidence Rate = 180 cases/1000 people per week
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