Had mine Sunday very early so went and had a full English breakfast, a lovely walk by the sea, a scenic bus ride and then a strawberry ice cream sundae I was just thinking life doesn't get any better than this and WHAM my legs went from under me, by the time I got home I was very ill, hot and cold shivers, headache, total fatigue the lot I was in bed by 7pm, still feel ill today and my bloody arm STILL hurts, DH had his at the same time and was fine . The thing is I have never actually had flu not until they inoculated me against it, luckily it didn't include the covid booster I have got that to look forward to