During one year, there were 67 new cases of influenza in Center City. thus, option A is correct.
The occurrence of new cases of disease or injury in a population over a given period of time is referred to as incidence. Although some epidemiologists define incidence as the incidence rate per unit of population, others define it as the number of new cases per community.
Influenza infection is dangerous and can result in widespread sickness and outbreaks. so, it is an example of the incidence of disease.
Learn more about the incidence of disease here:
https://brainly.com/question/14019707
#SPJ1