Doctors and nurses help people who are sick, but when a whole group of people, like in a town or a school, get the same disease or other health problem, there's a special name for the scientists who figure out what is going on: epidemiologist. They look for trends and causes behind outbreaks, and some people even call them "disease detectives".
In real life epidemiology can be serious business, but have some fun with it by picturing yourself as an epidemiologist or other type of scientist while playing Imagine Yourself... or investigate infectious disease outbreaks in MedMyst. Check out real-life stories of some current epidemiologists, or watch a video about Disease Detectives throughout history. You can even see some current outbreaks on this interactive map!
And you can always contact a librarian for more info!