Did you know that many people working in the hospital are detectives? They're always looking for clues to find out what makes kids sick.

Don't worry... you didn't do anything wrong! The hospital 'detective work' is only to help the doctors figure out how to make you feel better."

A special kind of detective work happens in a place called a laboratory.

At the blood laboratory, they may take a tiny sample of your blood and look at it under the microscope. They get a lot of clues from your blood, because it carries all kinds of tiny cells around your body.

Buster and Arthur think these laboratory detectives should star in their own comic book!