Your post got me thinking. I had shingles and tetanus vaccines together in January and developed PMR. I assumed it was the Zoster but maybe it was tetanus or the combination of both. I’ve recently done the flue and COVID about a month apart. No problems with COVID but was affected for three weeks after the flu shot.

I should add we think the reason the PMR flare up is just showing a week and a half later is because the day after the vaccinations, I started a Medrol pack, for a different reason, but that probably mask the flare up.

Have you ever had reaction to flu vac before?