| − | Adjuvant is a substance (e.g. aluminum salt) that is added during production to increase the body's [[immune response]] to a [[vaccine]].<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#a</ref> | + | Adjuvant was a substance (e.g. aluminum salt) that was added during production to increase the body's [[immune response]] to a [[vaccine]].<ref>http://www.cdc.gov/vaccines/about/terms/glossary.htm#a</ref> |