We can calculate the upper bound of risk from the document you provided. Moderna says 2% of plasma level of LNP ends up in the brain. There are 10 billion LNP in each shot of Moderna vaccine and at most 10% goes into general circulation unless nurse made a mistake and put it in your vein. So, 2% of one billion is 20 million LNP, that is the maximum that will end up in a person’s brain following a vaccine shot. So, maximum 20 million brain cells are at stake after each shot. Not all of them will be neurons.
We can calculate the upper bound of risk from the document you provided. Moderna says 2% of plasma level of LNP ends up in the brain. There are 10 billion LNP in each shot of Moderna vaccine and at most 10% goes into general circulation unless nurse made a mistake and put it in your vein. So, 2% of one billion is 20 million LNP, that is the maximum that will end up in a person’s brain following a vaccine shot. So, maximum 20 million brain cells are at stake after each shot. Not all of them will be neurons.