Flu shot and Covid booster

I got them both today, flu shot in the right arm, Covid in the left.  The nurse who gave me the shots asked me if I was right or left-handed.  After I said right-handed, she gave me the Covid booster in the left.  Tonight the left arm is sore; the right arm feels ok, except when I press it.  (My mom would say, “Then don’t press it.”)  

When I came out of the room after getting the shots, a man and a woman were waiting to get theirs.  I said, “Wow, that was really painful.”  They looked concerned.  My conscience got the best of me, and I told them I was kidding.