One is the aluminum content found in the brain tissue of an Alzheimer's patient, aluminum measured mcg/ g of tissue.
The other is the amount of aluminum in each of the childhood vaccines. Add them up to see totals.
"Aluminum was found in concentrations deemed to be
pathologically-significant in each of the four main lobes and
pathologically-concerning in the hippocampus. Aluminum content was
especially high in occipital and parietal lobes and was coincident with
significant Alzheimer’s disease-related neuropathology."