Comment by icegreentea2

It's very very unlikely that chickenpox vax will eliminate Alzheimer's, both in terms of chickenpox vaccine effectiveness, as well as there are almost certainly non-VZV "causes" for Alzhiemer's.

But yes, it's quite likely that widespread chickenpox vaccine will help reduce Alzheimer's rates.

It'd probably be a few more decades before you'd expect the cohort that received childhood chickenpox vaccines to reach an age where we'd see siginficant rates of Alzheimer's. Even then, it would it'd probably be quite difficult to disentangle.