Here in UK, we seem to have a weird mix of enthusiastic up-takers of vaccines and utter anti-vaxxists.
Upside, ~½ of population have had at least one dose. But, what is the 'seasonal flu' shunning proportion ? IIRC, ~¼...
Also, there is a growing number of people with 'Long Covid', whose 'chinese banquet menu' of 'systemic post-viral exhaustion' symptoms take many months to recover. In fact, there are worrying hints that some 'Long Covid' may develop into diabetes...
IIRC, no-one who's had a vaccination has later caught Covid and then developed 'Long Covid', but this may be statistical due 'insufficient data'...
Also, there's scant data on 'new variant' factors.
Happens I've had 'Long Symptoms' twice: 'Suspected Rheumatic Fever' as an adolescent left me weak as a new kitten for many, many months. Tests were inconclusive. As there was a vaccination-preventable kiddy epidemic doing the rounds, local facilities were a tad distracted.....
And, in the 70s, I caught a virus that kerb-stomped me. Our family had been out to beach for a stroll. After getting home, I suddenly said, "I don't feel well, I'm going to lay down...", fell across bed and fainted. I had huge fevers and sweats for a week, remember nothing coherent. And, yes, was again left as weak as new kitten for many months.
This time, follow-up tests established my immune system had totally nuked an un-identified virus, almost bankrupting my body. Clinic was very, very glad when my 'counts' slowly climbed back into 'green zone'. Though they monitored me for quite a while, I did not develop diabetes...
( Given my HLA kin, I suspect the clinic's researcher was almost disappointed...)