The Health Admin and vaccine producers have to guess what strain of flu is going to be the big killer . Then they have to generate out millions of doses of vaccine. And yes, people die of the flu.
You can be vaccinated against strain A, but still get nailed with strain B. Get it? Usually the flu shot "helps" even if you get attacked with another strain because you have a higher resistance level.
Would you get your horse vaccinated for $15 against a bug that would make him/her feel horrible for two weeks? Possibly kill your horse? Sure ya would.
Many folks say "I get a flu shot, then I get the flu!" Well, when you get the shot your body reacts like you have the flu. The vaccine is either dead or modified... so you might get a mild headache, sniffles or whatever for a day.( has never happened to me.) That still beats laying on the sofa feeling like crap on toast for a fortnight!
Get the flu shot. If you have kids ( nasty little germ spreaders), are older, have medical conditions ( such as emphysema, asthma, etc.) GET THE DANG SHOT. Don't be a sissy.
"There ain't no vaccine for stupidity* Maxine