Monkeys loose in Pennsylvania. SARS-CoV-2 spike protein can cross the blood-brain barrier, and the question of an artificially-produced Chinese communist virus spike crossing it is like eating your relative's brains to eventually get kuru. Medical science has nothing published as far as we know, about mRNA spikes crossing the blood-brain barrier and staying there to clog the machinery and produce prions or Alzheimer's.I've cited numerous studies about mRNA that show it's ineffectiveness once the wild virus is introduced. This is an experimental drug. We dont even know all of the possible side effects. It has only been a year since they have been injecting their experiment into the populace. Proper clinical studies take 5-12 years. We can't possibly know on mRNA. It has only been a little over a year since the experiment has started. Hundreds of thousands have died due to the injection and millions have been injured.