Btw, the arm soreness after vaccination is a combination of the needle going into the muscle, the muscle fibers being slightly stretched by the injection of fluid between them, and then the inflammation of the immune system realizing something foreign is in the arm and getting ticked off about it (this is good, it's the beginning of your immune response!).
Doctors recommend you keep the arm moving to keep blood flowing which can help reduce soreness. Ice packs also help!
I was told to chicken dance specifically
the list of chicken based medical treatments grows longer soup dance