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You can read the study to to get much more details about the mechanisms of action with Matrix-M, including interesting facts such as within 24 hours both the Spike antigens and adjuvant are undetectable at the injection site since they have already been processed and transported to the draining lymph nodes by immune cells.

I wonder if that is one of the reasons why many people feel much less pain in their arms after injection compared to mRNA shots? 5/