“the science people pushing this know this to be” possible:
https://www.pbs.org/newshour/science/tthis-chicken-vaccine-makes-virus-dangerous
So far, humanity has won the vaccination gambles when all is said and done.
The jihadi jabathon is not vaccinationville, it is not vaccinating. Polio vaccine, MMR vaccines, those are vaccines. These jabs you are pushing ARE NOT VACCINES.