John in NM
Second shot this morning.

Nurse told us that people had been reporting that the shot hurt more, or perhaps burned more? (it didn't in my opinion ). People have also been reporting greater incidence of cold/flu symptoms the day after the second shot - her explanation for that makes sense, the booster gives your system another look at the thing it needs to kill and it gets right to doing it. Seems plausible.

Incidentally, I only barely felt the second shot, didn't even notice the first. The only other shots I've had recently were novocaine at the dentist, so I was expecting worse. Light gauge needle in an insensitive shoulder I guess.