A prevalence survey conducted from January 1 through December 31, 2015 identifie

Question

A prevalence survey conducted from January 1 through December 31, 2015 identified 750 new cases of measles in a city of 1.5 million persons. The incidence rate of measles in this population has historically been 1 per 5,000 persons each year. Has the risk of measles increased or decreased during 2015?

A. The risk of measles has remained the same historically B. Cannot be determined with the available data C. The risk of measles has decreased over the historic incident rate D. All current cases need to be accounted for to determine. E. The risk of measles has increased over the historic incident rate

Explanation / Answer

750 out of 1.5 million means 750x5000/1,500,000 in 5000

= 2.5 in 5000

So, more people got affected with measles in 2015

E.The risk of measles has increased over the historic incident rate

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