Got the second poke yesterday late afternoon....15 hours later arm is slightly tender to the touch, no other side effects at all...so far. Only advantage to getting up there in years is side effects tend to be less than younger people. Our immune system is less effective than younger folk. It might be a two-edge sword...it's unknown if our system is then less protected. Oh well, guess we'll see. In the meantime and for the foreseeable future it's mask, distancing, etc.