What does an epidemiologist study?

When disease outbreaks or other threats emerge, epidemiologists are on the scene to investigate. Often called “Disease Detectives,” epidemiologists search for the cause of disease, identify people who are at risk, and determine how to control or stop the spread or prevent it from happening again. Physicians, veterinarians, scientists, and other health professionals often train to be “Disease Detectives.”

Source: Centers for Disease Control and Prevention