Given the discussion of the COVID injections, I have a feeling that other vaccines will get called into question. I learned of the following research from "The HighWire" if I recall correctly. I think the subject of aluminum in vaccines is very important. It is one of the substances that could be producing Alzheimer's like disorders and other mental and physical problems. This work in sheep would obviously make people concerned about human vaccines so I think it has been suppressed.
https://journals.sagepub.com/doi/full/10.1177/0300985818809142
A lot of people are cautious to avoid aluminum containing deodorants. I wonder if most people know a lot of vaccines are very high in aluminum and it is injected, bypassing the normal barriers.
This reference seems important to me but I could not access the full paper:
https://www.sciencedirect.com/science/article/pii/S016201341930501X