Disease Frequency

Disease Frequency

Definition

• Quantification of disease occurrence in a population

Key Measures (NSLD)

1. Number of Individuals Affected

2. Size of Source Population

3. Length of Time Population Was Followed

4. Different Levels of Disease Occurrence

Types of Disease Occurrence (EEPSO)

• Endemic: Constant presence within a geographic area.

• Epidemic: An increase in disease cases beyond what is normally expected in a population.

• Pandemic: An epidemic that has spread across multiple countries or continents.

• Sporadic: Occasional cases occurring at irregular intervals.

• Outbreak: A sudden rise in the number of cases in a specific area.