I've reviewed the paper, and it does seem to support these findings in this paper from July: www.nature.com/articles/s41...
nature.com
The recombinant shingles vaccine is associated with lower risk of dementia - Nature Medicine
A natural experiment including more than 200,000 people who received a shingles vaccine reveals that, within 6 years of vaccination, the recombinant vaccine is associated with lower risk of dementia t...