Aluminium adjuvants and vaccine safety
The majority of vaccinations use an adjuvant to boost their effectiveness and in most cases the adjuvant is an aluminium salt including aluminium phosphate and aluminium hydroxide.
The simplest explanation of how an aluminium adjuvant works is that its injection into the muscle or under the skin produces toxicity, thus providing greater immunity to a particular disease. This is what accelerates and enhances the immune response to the specific vaccine antigens. Without it, the body may react too weakly to build up the required antibodies.