My second Pfizer COVID-19 vaccination yesterday has not caused any problems. I was concerned because a couple of people I know had a negative reaction to it. The first vaccination made my arm feel more sore than I thought it should, but only for a couple of days. With the second vaccination, I only had a little bit of soreness last night. It makes me wonder if the level of soreness is affected by how the person giving the injection does it.
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