Sneakylong I've mentioned this before. Years ago I had a flu shot from a nurse at my then doctors office. She bragged that her Flu shots never resulted in sore arms. She was right, no sore arm. She didn't reveal her trick.
My only guess is she gave the shot lower in the bicep. The Pharmacist said something about the Deltoid muscle etc.. Said he went a little lower than usual. So we shall see......
I recently got 5 jabs. Flu in left arm. The next week RSV and Prevnar (Pneumonia) both in left arm. Third week Covid 19 and Tdap both in left arm. All shots done by the same Pharmacist at Kroger. All high up on the arm. No stings on any shots and no soreness later. Also no reactions from any jabs. Best jab sessions ever.