@mydogsbestfriend We also had those flu-like symptoms after the initial vaccine shot in Feb of 2021. Then, 30 days later, we got the 2nd shot, both had hips and knees hurt for 2 days. After that no issues with follow up boosters. What surprised me is we both got Covid after booster mid Nov 2023 and the flu shot. It will be 3 weeks tomorrow, still having the feeling of slightly better one day, not good the following day. Headache, eyes hurt, coughing, sluggish. Hope this clears up soon.