A weakened or inactive version of a pathogen that stimulates the body's production of antibodies which can destroy the pathogen.<ref>Wile, Dr. Jay L. ''Exploring Creation Through General Science''. Anderson: Apologia Educational Ministries, Inc.
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A weakened or inactive version of a pathogen that stimulates the body's production of antibodies which can destroy the pathogen.<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc.