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An epidemic is he occurrence of [[disease]] within a specific geographical area or [[population]] that is in excess of what is normally expected.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#e</ref>
An '''epidemic''' is he occurrence of [[disease]] within a specific geographical area or [[population]] that is in excess of what is normally expected.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#e</ref>
==References==
==References==