To be clear Dr Feming said, "the spike protein (covid-19) is crossing the blood brain barrier. We now know they form spongiform encephalopathy (mad cow disease)"
Crossing the blood brain barrier does meet the category of being neurodegenerative disorders. Which is not good. Forming mad cow disease I question.
The vaccines are less then useless with the exception from Fleming J&J Janssen vaccine has some effect. What fights Neurodegenerative disorders is higher levels of HDL which vitamin B3 raises HDL by 30%. Cromoglicic acid is an inflammatory prevention. Palmitoylethanolamide is an excellent anti-neuroinflammatory. Which the article above explains Anti-oxidation and anti-inflammation is key for prevention
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4252583/