Got my first Moderna yesterday. No problems other than my arm being a little sore. Still got a workout in at the gym today and feel fine. Next one in 4 weeks. My daughter is in her 20’s and in grad school. Works part time in a medical office and had to get the vaccine. She got the moderna first shot sore arm. Second shot felt sick and awful all night. Later the next day she was fine. Seems to be consistent with people saying younger people tend to have more of a reaction and discomfort from the second shot.