Thank you for sharing your comment. While that's true, the chickenpox vaccine was only licensed for use in the 1990s. That was 3 decades ago, so those who had the chickenpox vaccine are likely in their 30s now. But those who are at risk of shingles and dementia are individuals older than 60.

If I'm not wrong, individuals who got the chickenpox vaccine can still develop shingles, assuming they were exposed to the virus, although the risk is much smaller compared to those unvaccinated.