I have had Flu twice, 1st time DD was 7, I had to crawl downstairs to keep an eye on her, she made a wonderful nurse. 2nd time I was a few years older, I've had really bad colds, Christmas 2016, I was very ill but it was not Flu.
I have had Flu jab for many years although I am only 62 but I qualify being Epileptic & now Diabetic (Type 2). I also had the Pneumonia jab, the following year I was in Hospital for 5 weeks so I have little faith in the "lifetime" protection.
Hospitalisation should only be for the seriously ill, very young or elderly who have no support at home. As a Widow I do worry about being too ill to care for myself, DD lives about 10 miles away but with a Disabled Partner & DGSs she can't do much.