Several people we know had 100+ fevers for 24-48 hours and major fatigue and flu-like symptoms for a few days. They were really laid-low for a while. Missed work and all that. I am not a vaccine expert, but that seems more intense than I have ever heard about the flu vaccine. The handful of folks I know who have gotten COVID itself over the last few months had very mild symptoms, mostly the taste/smell thing with sometimes a touch of fatigue. That’s just my circle, however. I’m sure others have vastly different perceptions.