AS02 vaccine adjuvant obsolete AS-2 vaccine adjuvant true http://www.pasteur.fr/applications/euroconf/vaccins/vaccins-abs.html A combination vaccine adjuvant and is based on the combination of Monophosphoryl Lipid A(MPL), QS21 (a purified fraction of Saponin extracted from Quillarja Saponaria), and a proprietary oil in water emulsion. Samantha G. Sayers terms merged