watermeadow
No vaccines give 100% protection and no doubt most of those hospitalised with flu are old and frail.
Flu is horrible. One of my daughter’s entire family had it all through the Christmas holidays and it’s left my daughter exhausted.
I was only early 40s when I once had it over Christmas. It knocked my stuffing right out for at least 3 weeks, and even after I was miles better I still remember walking the dog with dd1, who said, ‘Mum, can’t you walk a bit faster?’
‘Sorry, darling, I honestly just can’t.’
(Any GN prudes please skip this bit, but after so much coughing the relevant muscles were so affected that for quite a while afterwards any cough or sneeze meant that I both farted and wet myself! (Only minor leaks, but still…)