In 2013, Welsh health officials faced a shortage of shingles vaccines, leading to a cutoff based on age that created an unexpected study environment. The resulting research, published in Nature, showed that individuals vaccinated against shingles were 20% less likely to develop dementia compared to those who were not vaccinated over seven years. This suggests a causal relationship between the shingles vaccine and a reduced risk of dementia. Researchers note that this evidence stands out amid prior studies limited by observational methods and animal testing.
This study really shows that there seems to be a causal, protective effect of shingles vaccination preventing or delaying dementia, says Pascal Geldsetzer.
According to findings published this week in Nature, people who received the vaccine were 20 percent less likely to develop dementia over the next seven years compared with those who remained unvaccinated.
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