I had the shingles jab last autumn. The recent ad on TV mentions one of the lesser symptoms of shingles, is suggested to be a feeling of being stabbed in your back.
Prior to having the jab, and for a few years, I would sometimes get a minor pain in the skin surface of my back, as if someone was jabbing me with a pin. Since having the shingles jab, the incidents diminished completely. I am left wondering if the feeling might have been a warning of the onset of shingles, forestalled by the jab.