Routine vaccines may cut dementia risk—experts have startling hypothesis on how

Vaccines may be training a part of our immune system long thought to be untrainable.

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[Flailsafe]

So if I'm understanding this correctly, the basic idea is that by periodically using an artificial method (vaccines) of stimulating an immune response, we're basically keeping our immune system revved up and capable of reacting to all pathogens - not just the ones we've trained our system to recognize?

That makes a lot of sense, but also seems to imply that dementia is caused by a specific pathogen that might eventually be identified, and presumably we could then develop a specific vaccine against that, right? If that's correct, it seems to me like maybe the most revolutionary idea in this research.

I think that is part of one idea (regarding any vaccine showing better responses to other pathogens).

The other idea is tamping down the inflammation response which can damage the brain and increase chance of/conditions for dementia. Dementia is broad category of many possible causes.

Vaccines help the body fight the infection quicker and easier, lowering the innate response of fever/inflammation.

Not an expert so my understanding may be off.