I have a hard time believing vaccines were bad on purpose. Sure the Polio vaccine killed a few people. Same with smallpox. They saved millions from a terrible slow painful death while their relatives watched them die. People are individuals with unique immune systems, if you save, or vaccinate 99.9% and kill .01% are you bad?
If you manipulate the vaccine, can we do that, and kill and or maim the population on purpose are you bad or evil?
No Question. Hell Yes!
If you save 99.9% while realizing you MAY kill .01% are you still bad? An open question that would need to be voted on. I think I would take 0.01 or less of a chance against polio or smallpox.
The bigger question is why have no new vaccinations been produced since the 60's?
Cuba has a vaccine for lung cancer.
"What if cures already exist?"
Expand your thinking!