You guys have already figured it out, but in basic drug development, when we're trying to figure out adverse events, we ask "nonleading questions," like, "how do you feel since we last saw you?" In vaccines, we have a list of solicited complaints and ask you straight up about injection-site complaints and systemic complaints. There's a group that we always ask, adding in a few others that we saw in early studies. Injection-site complaints that we always ask about are erythema (redness), pain/tenderness, and swelling. For each, we evaluate size and intensity, but only when the good-looking nurses have left the room. (ba-doom-boom) Systemic complaints are usually arthralgia (joint pain), fatigue, headache, and myalgia (muscle pain). We also check temperature.
You can dig up the fact sheets for each vaccine on FDA.gov. Moderna lists fatigue, headache, myalgia, arthralgia, chills, nausea/vomiting, axillary swelling/tenderness, fever, swelling at the injection site, and erythema at the injection site. And if you dig around for the published findings (I think Pfizer is in Lancet and Moderna is in Nature) you can see some cool graphs of what to expect. I THINK I've got 2 attached correctly, but I've started drinking early. (You'll see the 10-mcg and 30-mcg levels, which each had a 2-injection treatment, and a 100-mcg dose which only had 1 injection. This was the dose-finding study.)