Common source epidemics can be classified into two main types:
1. Point Source Epidemics: In these cases, exposure to the infectious agent occurs over a brief period. An example is a group of people who become ill after attending the same event and consuming the same contaminated food.
2. Continuous Source Epidemics: Here, the source of infection is prolonged, causing cases to arise over a longer duration. An example would be a contaminated water supply that continues to cause illness until the source is identified and addressed.
