Yeah, so much controversy around this particular vaccine; and rightfully so in my opinion mainly because it was so rushed/also...so 'pushed'.
Funny/not so funny about the shingles vaccine; we had a friend who came down with shingles & truly suffered with it for a good three weeks, maybe a month. Total happenstance (I think) about who gets it naturally & who does not; of course the only 'requirement' is if you have ever had chicken pox.
So anyhow, my husband and I took to heart her pain & suffering & ran right out & got vaccinated for shingles. A week or two later HE came down with a real doozy of a case of shingles. That was the first attempt at marketing a shingles vaccine......in hindsight, a quite flawed vaccine; my suspicion is that it actually triggered an onset of shingles in some people. They came out with a supposedly better one a bit later. I'm not sure if he got that one or not; but not me, my thought on that was to just leave well enough alone.
I guess we really can't expect any/every attempt at vaccines to be perfect.