Absolutely no question the flu vaccine works. It can be debated whether everyone should get it, but the gigantic pandemics do not occur like they used to occur.
Disinfectant wipes help as well.
The gigantic pandemics don’t occur like they used to in countries that don’t vaccinate also. There’s a lot of stuff that’s changed in our world since the last big pandemic, better understanding of germ theory, higher overall cleanliness, and wider availability of indoor plumbing probably have at least as much to do with the eradication of pandemics as vaccinations. Especially when it comes to something that mutates as regularly as the flu where there’s always a good chance that the flu you were vaccinated against isn’t the one you were exposed to at work.
So how come Europe is not getting any of those gigantic pandemics in spite of the low vaccination rates?
There’s a national park where I hike and parts of it, formerly being private property, have homestead ruins, etc. on it. Back in the woods is an old cemetery. It’s interesting but terrible to walk through it ... almost all of the deaths were in 1918 from the ‘Spanish flu’. Young, old, middle-aged ... all represented in the graveyard. It must have been really terrible back in the day when that was going on.