My PCP told me to hold off until late 50s on the argument that there's no indication for boosters, and if I were to live a long, full life that the protection would be waning as I enter my more vulnerable years.
I understand the argument and it makes sense on paper, but this doesn't seem to be a general sentiment.
I looked this up recently because I was vaccinated for it a couple years ago. What I found was that you're recommended to get a booster after 7 years (my doctor said around 10 years when I got the shot).
My PCP made the same argument (which I wrote much less clearly than you did in another comment). My sister-in-law had it last year (at 43) and she was miserable. Rolling the dice on this scares the willies out of me.
This is counter-intuitive for me. Immune system senescence is a thing. Naively I would assume it should be better to get it early, as a younger immune system has better odds to react strongly to the antigen, providing long lasting protection. Often the elderly organism doesn't react, or the reaction is too weak, to vaccine stimulation. E.g. see https://www.sciencedirect.com/science/article/abs/pii/S01652...