I'm 70 yo, female, and have 6 covid vaccines. After the Moderna or Pfizer shots I have ~24 hours of a sore arm, severe insomnia, and fatigue, but otherwise zero side effects. My husband just gets a sore arm and a bit tired. I do have multiple autoimmune diseases, osteo(porosis, arthritis), and such, but the shots had no effect on those preexisting conditions. I had covid March of 2023; caught it from a fellow cyclist on a 350 mile bike tour. It morphed into 8 months of long covid, the symptoms of which were fatigue (PEM) and cardiovascular issues (no permanent damage). Everyone is a bit different regarding reactions, but I'd rather be sick for a day with a shot than increase my risk of a severe covid reaction.