Heck, I'm "middle-aged", and recently received boosters to this and to my DPT, given all that is being allowed to come across our borders unchecked, and that I have a new infant granddaughter that I do not want exposed.
I have not, however, has a flu shot, nor do I intend to do so.
I suspect the “antivaxxer” BS is nothing but an excuse or distraction. The pressure to have kids get the basic vaccinations is just too great for most American parents to withstand.
Illegals on the other hand...
It seems that for the last five years a number of times after visiting the grandkids I'd come down with a cold or something worse. Last year after visiting the grandkids, I came down with flu symptoms that had me down, sick and coughing every day for almost two months.
Now this year after visiting the kids over Christmas I've not contracted anything.