HIQA Scoping Review Finds No Causal Evidence That Shingles Vaccination Reduces Dementia Risk (hiqa.ie)

• HIQA scoping review finds no causal link between shingles vaccine and lower dementia risk.
• Observational studies show association but confounding factors likely.
• HIQA will review new evidence since 2024 HTA before deciding on national vaccination program.

"HIQA published a scoping review examining evidence on shingles vaccination and dementia risk. The review found some studies showing association between vaccination and lower dementia incidence, but could not prove causation due to lack of randomized trials. Potential confounding factors like healthier lifestyles among vaccinated individuals may explain the observed link. HIQA will consider findings in future review of shingles vaccine effectiveness."