Have you ever heard of an "epidemic", perhaps as in a "flu epidemic", or "polio epidemic"? "Epidemiology" is a branch of medicine that deals with the study of "epidemic" diseases. "Epidemics" usually affect a lot of people at one time or in one place. So "epidemiology" can include studying groups of people who have been exposed to something in the environment (like pesticides, or ozone) to see if they have been affected by this exposure.
[Get Your Own Lab-Coat]When you encounter the words "Non-NIEHS Site", it means that by following that link you will be leaving the NIEHS website. NIEHS is NOT responsible for non-NIEHS websites. Sites maintained by outside organizations may be changed without notice to NIEHS. Therefore, unless the link is to another U.S. government sponsored webpage, endorsement by NIEHS is not implied, and NIEHS does not guarantee their continuing safe content or privacy policies. So please ask your parent or guardian before continuing to any non-NIEHS website, and especially before providing any information via the internet or by e-mail. When last reviewed, the websites linked from the NIEHS Kids' Pages seemed suitable for you to visit, but that may have changed; if you have any difficulties or concerns with any linked materials, please let us know.
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