Bruce, I am telling you, a shot with cold vaccine can hurt for days and cause a bruise! I always request to have mine warmed up by holding it in my hand.Not the case here. My left arm hurt A LOT for 3 days, most notably at night when I rolled and slept on it. Well, slept might be an overstatement. This isn't "I just got a shot" pain that goes away in a few hours.
yeah 2-4 or maybe longer. My second was about 5 months due to the pharmacy not doing vaccines for a few months. I was really glad they didn't decide I needed 2 closer together which would have made 3 total.