Health, true, but my assumption is that there is a population among his patients that’s recommended to get the shot, so he’s thought about this.
I’ve heard local doctors talk about this shot, they’re on the radio at least weekly. For the most part they’re saying what you say. But some are so arrogant (the MDeity type) that it’s hard to be mekabel. So I’ve still been trying to listen to the experts, and come to my own conclusion.
Anyway, moot till I can find a clinic not on Shabbos (NONE of our offfices – pediatrician, specialist, etc. have the shots).