| − | '''Etiology''' is the study of cause, particularly in a [[medicine|medical ]]context.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#e</ref> | + | '''Etiology''' is the study of cause or origination of something - particularly in a [[medicine|medical]] context.<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#e</ref> |