Flu may not be too dangerous in people who aren't elderly but it still sucks. Can a non-elderly, not in any other high risk group, person get seasonal flu vaccination in Europe if they ask for it, and is it covered by European health care systems?
They're not only covered by the gesetzliche Krankenkassen (German public health insurance providers, mandatory if you don't meet the criteria for private insurance), mine gives me a little bonus if I prove I've gotten various vaccines, including annual COVID booster and flu.