epidemiology
/ˌɛpɪˌdiːmiˈɑːlədʒi/
noun
- The study of how diseases spread and affect populations, and how to control them.
- The government used epidemiology to track the source of the food poisoning cases.
- Epidemiology helps scientists understand why some communities are hit harder by flu outbreaks.
- She decided to study epidemiology after seeing how quickly a virus spread through her city.