I have a sore shoulder/neck. My left shoulder/neck. So when the pharmacist asked me which arm, I said, I don't care and he zero'd in on my left arm. And, since I'm 65 I got the superduper flu shot which, he said, sometimes produces stronger side effects. I just laughed him off. I don't get side effects.
Soooooo now my entire left side hurts and I feel like crap. Good thing I don't have anything I have to do. The way I feel now, I might even skip swimming tomorrow morning. Ugh.