Archive · 5 Oct 2026
Shingles Vaccine Linked to Lower Dementia Risk in Study
Scientists studied health records from Wales to look at shingles vaccination and dementia.
They used a rule that determined who could get the vaccine as a kind of natural experiment.
Over seven years, people who were eligible were less likely to receive a new dementia diagnosis.
Their relative probability was 8.5% lower than for those who were not eligible.
The researchers estimated that people who actually got the vaccine might have about a 20% reduction.
The study does not say the vaccine prevents dementia for certain.
It reports evidence of a possible connection.
A study published in Nature examined health records from Wales.
Researchers used a shingles-vaccine eligibility rule as a natural experiment.
People eligible for vaccination had an 8.5% lower relative probability of a new dementia diagnosis over seven years.
Researchers estimated that among people who received the vaccine, the reduction could be around 20%.
The findings suggest a possible link between shingles vaccination and lower dementia risk.
- Who
- Researchers studying health records from Wales.
- What
- A study found that shingles-vaccine eligibility was associated with a lower probability of a new dementia diagnosis.
- When
- The reported dementia diagnoses were tracked over seven years; the article does not specify when the study was published.
- Where
- Wales.
- Why
- Researchers examined whether shingles vaccination might be linked to dementia risk.
Potential benefit
What the finding establishes
Interpretation of the association
Potential benefit
The results suggest shingles vaccination may be linked to a lower risk of a new dementia diagnosis.
What the finding establishes
The article reports an association and an estimate; it does not establish that vaccination prevents dementia.
- Publication
- Nature
- Records studied
- Health records from Wales
- Research approach
- A vaccine eligibility rule was used as a natural experiment
- Follow-up period
- Seven years
- Finding for eligible people
- 8.5% lower relative probability of a new dementia diagnosis
- Estimate for vaccinated people
- Around 20% reduction, according to the researchers