Shingles Vaccination Linked to Lower Dementia Risk, New Research Suggests
- 24 hours ago
- 1 min read
Could a vaccine designed to prevent shingles also contribute to protecting brain health? New research suggests this may be possible. Scientists analysing health records from older adults have found that individuals who received the shingles vaccine appeared significantly less likely to develop dementia compared with those who were not vaccinated.
The findings come from a study led by researchers at Stanford University and published in the scientific journal Nature. The research analysed large-scale health data from Wales and took advantage of what scientists describe as a natural experiment.
When the shingles vaccination programme was introduced, eligibility was determined strictly by date of birth. As a result, people born only weeks apart were either offered the vaccine or excluded from it. This allowed researchers to compare two otherwise very similar groups and observe differences in their long-term health outcomes.
Over time, researchers found that individuals who had received the shingles vaccine were approximately 20% less likely to be diagnosed with dementia. The underlying biological mechanism behind this association is not yet fully understood, but scientists believe it may relate to preventing viral reactivation.
The virus responsible for shingles, the same virus that causes chickenpox, can remain dormant in the body for decades. Its reactivation may trigger inflammatory or neurological processes that could influence cognitive decline.
Although further studies are needed to confirm this relationship and better understand the biological mechanisms involved, the findings are attracting growing interest among researchers studying dementia prevention. If confirmed, the results could highlight an additional and unexpected benefit of vaccination in supporting healthy ageing.