Flu vaccination linked to 40% reduced risk of Alzheimer’s disease

Lots of discussion in this thread about the accuracy of the implied claim "vaccination can prevent Alzheimers", but not a lot about the correct course of action.

Which seems to me to be, unambiguously, you should absolutely be religious about getting your flu shot every year. The vaccine is known to be safe and with few side effects (or at least, safer than the actual flu, which is the bar that needs to be cleared.)

And even if it hasn't been conclusively proven that vaccines can avert Alzheimer's, you're at least putting yourself in the best possible cohort, right? Anyone familiar with Bayes' Theorem should be absolutely on board with this.

I will say, as someone with an egg allergy it isn't so black and white. Not everywhere carries alternative ways of getting flu vaccine, though hopefully post Covid mRNA versions will become more prevalent (assuming that version has the same impact, haven't read the article).

There are apparently two egg-free options: https://www.cdc.gov/flu/prevent/egg-allergies.htm

Yes there are versions that are not egg based, but last I remember they were not guaranteed to be available at a given location (I haven't gotten the flu shot in years because it was tedious). Which is why I'm hoping as mRNA as a mechanism grows more common non-egg based shots will as well. I remember when I was getting the covid shot being paranoid and triple checking that it in no way shape form or fashion used egg.

Is mRNA really better? My impression (not based on high quality data) is that the mRNA COVID vaccines are rather more unpleasant to receive than a flu shot. Of course, there is a distinct lack of other mRNA vaccines for comparison.