You are here Home Glossary of technical terms Glossary of technical terms adjuvant Listen Print Share Twitter Facebook Email A substance that is added to a vaccine during production to improve the immune response to that vaccine Page history Last updated 6 February 2019 Last reviewed 6 February 2019 Is there anything wrong with this page? Help us improve the Australian Immunisation Handbook What you were doing? (required) What went wrong? (required) Leave this field blank