Terrence Howard plays a music mogul in a new series on Fox. CHICAGO â In the presidential suite of a Hilton hotel, above a ballroom full of extras waiting to shoot a lavish party scene, sat the two lead actors of âEmpire,â a new Fox series about a feuding entertainment-industry family.
Prevalence is a statistical concept referring to the number of cases of a disease that are present in a particular population at a given time, whereas incidence refers to the number of new cases that develop in a given period of time.
Prevalence. The number of people in a population who developed a disease at a specified time, regardless of when it first appeared. This takes into account both old and new cases. It serves as an indicator of how seriously and how long a disease affects a population.