Epidemic - GCSE Biology Definition

An epidemic is when a disease spreads quickly and affects many people within a community or area at the same time. Unlike regular illnesses, which might affect only a few people, an epidemic can spread to many people very quickly, causing concern and requiring action to control it. Epidemics are typically caused by pathogens, such as viruses or bacteria, and can spread across a range of locations, including towns, cities, or even entire countries. Understanding how epidemics occur and spread is important in biology because it helps in developing strategies to prevent and manage them, keeping people healthy and safe.