- Endemic: A disease is considered endemic when it is consistently present within a specific geographic area or population group. Malaria in certain tropical regions is an example of an endemic disease. - Epidemic: An epidemic refers to an outbreak that affects a larger number of people than is normally expected in a short period. Influenza outbreaks during the winter season often fall into this category. - Pandemic: A pandemic is an epidemic that spreads across multiple countries or continents, typically affecting a large number of people. The COVID-19 outbreak is a recent example of a pandemic.