https://www.shtfplan.com/headline-news/the-vaccine-study-that-should-have-brought-down-the-empire
The Vaccine Study That Should Have Brought Down The Empire.
Not mentioned in the above story about the study is the information that a single veterinary vaccine was also examined and found to be contaminant free. I hope to find the sauce for that as it is my recollection of the original study.