A doctor looks at PET brain scans at Banner Alzheimers Institute in Phoenix on Aug. 14, 2018. The shingles vaccine may reduce the risk of developing dementia, according to research from Stanford. The shingles vaccine may reduce the risk of developing dementia over seven years by about 20%. That’s more than any other known intervention, according to research from Stanford. The findings are based on what the Stanford news service calls “an unusual public health policy in Wales,” which created what amounts to a natural experiment. The Stanford Medicine study...

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