If you'd had flu, you'd get the jab, it can very awful.
They do a lot of work to establish the most likely variants in circulation – it's not guesswork – even if they are off, the vaccination still offers some protection against more severe symptoms.
^^^ This
I've had it or something very similar twice possibly 3 times
I've still got issues from the 3rd time, 10 years ago, i've had the jag most years since cos my employer decided all staff can get it not just frontline, believe the only board to make that decision.
that time i rode to work feelnig normal, by the time i was up at blood transfusion around midday i thought "hud on this isn't allergies and over warm building issues", rode home after work and went straigh to bed, hardly getting out of it for a week, then incapable of working for another week due to needing lots of sleep and running out of energy quick, didn't recover to something normalish for another month, like getting my voice back.
and that's still considered mild...
according to the infosheet
h1n1-wisconsin
h3n2-darwin
b2021-austria
b2013-phuket