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Is the 100-year old TB vaccine a new weapon against Alzheimer’s?

A pilot study by Coad Thomas Dow of the University of Wisconsin-Madison and his colleagues suggests that BCG injections can effectively reduce plasma amyloid levels, particularly among those carrying the gene variants associated with a higher risk of Alzheimer’s. Although the sample size was small – just 49 participants in total – it has bolstered hopes that immune training will be an effective strategy for fighting the disease.