There are many reasons for using this adjuvant. First, for each content... perhaps four vaccines, with an adjuvant. Second, the adjuvant protects against virus mutations, which is an advantage. Third, there is evidence that certain groups, particularly seniors, have a better immune response with this type of adjuvant.
The Americans and Europeans have worked with us on developing regulations. We have reviewed the tests and research studies. All of the studies are good. Health Canada has reviewed the information and will make its decision very soon.