I heartily suggest reading "The Sleeper Agent", featured on the "McDuff Lives" Rumble channel currently. Mr Finnegan (the author) has tracked down the origins of the world's bioweapons tp pre WW1 Britain, Germany, the Soviet Union and the USA, all working with one another at different points in history. It's a truly game changing book and it it 100% footnoted and ssupported with official documents.
https://rumble.com/c/McDuffLives
Has both a commented reading of the text of the book along with eight (and counting) interviews with the author.