The worst reaction I can recall throughout my life, from a vaccination or a flu shot, was a sore arm, for a couple hours. My COVID vaccinations, for example, left me with a sore arm, for an hour or so on the first shot and nothing, no pain, on the second shot. But this Shingles vaccination shot… WOW. Knocked me for a loop. It’s a Two part vaccination, so in about three months I have to get the second shot. Though considering what I’ve heard from people who’ve had Shingles, this short reaction is a price I’m willing to pay so that I NEVER get that virus.