A case-control analysis of Parkinson's disease and infections in childhood was conducted in a cohort of 50,002 Harvard College and the University of Pennsylvania graduates. Those who had measles in childhood had a 2-fold lower risk of Parkinson's disease. Chickenpox and mumps also reduced Parkinson's risk.
More similar studies: [1], [2]
A measles vaccine, on the contrary, sometimes causes Parkinson’s in children.
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