I did no such thing. I merely quoted the Interpretation (i.e., conclusion) from the abstract. However...
"According to this analysis of data from a large-scale longitudinal study of elderly Canadians, vaccination against diphtheria or tetanus, poliomyelitis or influenza was associated with lower risk for Alzheimer's disease than no vaccination."
This is the Interpretation later on, after the longer discussion of the methodology, analysis and results.
Which part were you looking at?