“The risks are low enough that it usually makes more sense to just give the revaccination rather than testing first.”
I think it gets tested at every routine physical when they test cholesterol levels and such, so I don’t see why you wouldn’t want to be tested. Like Charlie, I also recently got a booster and it cost over $100. My primary care physician didn’t have any because of a shortage, so I had to go to a place where my insurance wouldn’t cover it. The lesson: there are costs, and people who don’t need it should not be hogging it. It’s not infinite.