An epidemiologist recruits 250 people for a cohort study. Of these potential study subjects, 11 are prevalent cases. The remaining study subjects are followed for 5 years, during which time 21 individuals develop the disease being studied.What is the prevalence of disease at the start of the study Assume all of the cases are still around at the end of the study. What is the prevalence now and What is the incidence proportion over the period of observation?

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Health Epidemiology

Health is an essential factor for all human beings. For all humans, health is a critical factor. An individual's ability to meet life's challenges and retain his or her capacity for optimal functioning is reflected in his or her condition of health. This needs the physical, mental, and biological parts of one's constitution to maintain a degree of functioning that has a favorable influence and support for one another.