There's a lot more to learn.
This is a virus that hadn't been seen before it appeared two years ago. BUT (and it's an important 'but'), there's a lot about viruses in general that we DO know.
And we've learned a lot about Covid-19 in the past two years, including how to create a vaccine to help prevent it (not perfectly, but no vax is).
The part that's infuriating is how many people simply refuse to believe it.
They pretend it's a 'hoax'.
Or that the vax is killing people.
Or that they won't get it.
Or if they do get it, it will be 'just like the flu'.
So many of them have wrapped up their 'tribal identity' (political views) in it.
The unvaxed are dying by the thousands.
Something like 80% of them are Trump supporters.
If they weren't overloading the health care system I really wouldn't care (regardless of their political alignments).
If they want to risk dying because of their idiocy, that's on them.
But they're filling the hospitals.
To the point that other people, people with legitimate health issues, people that DID take proper precautions, get vaxed, ect are being denied care because of the morons.