Gotta say, my 1st Moderna shot happened right after I proved who I was and had a valid reservation. The gal who administered the shot recommended I begin exercising my arm immediately after…which I began doing by swinging my arm side-side even as I walked to the assigned 15min holding chair. Many other holding chairs were occupied but folks just sat there. I continued swinging my arm throughout the 15 min period rather than just sit there like the others who probably heard the same recommendation.

Result: No soreness whatever. I felt fine and for a few days afterword only had a sore spot immediately around the point of needle entry which was just a dot.

2nd Shot: Arm side-side. Result same-same.