An Intriguing Link Between Shingles Vaccination and Lower Dementia Risk

A large Canadian natural experiment adds to growing evidence that herpes zoster vaccination is linked to fewer new dementia diagnoses, though biological mechanisms remain unclear.

Older adults who were eligible for a free shingles vaccine in Ontario experienced a modest but statistically significant reduction in new dementia diagnoses over more than five years, reinforcing similar findings from the UK and US and strengthening the case for a potential protective link between herpes zoster vaccination and brain health.

Study Details

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