Which term describes the total number of existing disease cases in a population at a given time?

Which term describes the total number of existing disease cases in a population at a given time?

• A. Prevalence
• B. Incidence
• C. Morbidity
• D. Mortality

Answer: (A)

Prevalence is the measure of the total number of people in a population who have a disease at a specific point in time. It captures the overall burden of the condition at that moment, regardless of when the disease began, and is usually expressed as a percentage or per 1,000 people. For example, if a city of 50,000 has 1,000 residents with a chronic condition on a given day, the point prevalence is 1,000 divided by 50,000, or 2%. This differs from incidence, which only counts new cases that develop during a defined time period. Morbidity refers to illness in general, and mortality refers to deaths.

Prevalence is the measure of the total number of people in a population who have a disease at a specific point in time. It captures the overall burden of the condition at that moment, regardless of when the disease began, and is usually expressed as a percentage or per 1,000 people. For example, if a city of 50,000 has 1,000 residents with a chronic condition on a given day, the point prevalence is 1,000 divided by 50,000, or 2%. This differs from incidence, which only counts new cases that develop during a defined time period. Morbidity refers to illness in general, and mortality refers to deaths.