>but they are far from being a majority. I'm confident we will be able to eradicate this virus with vaccines, like we have (mostly) done so in the past with diseases such as polio or tetanus.
No of course they're not a majority, but there are enough out there that it reduces herd immunity; I'm not epidemiologist so I can't really make an argument as to how much, but it will be > 0.
Yeah polio is unfortunately a perfect example of how one community for whatever reason choosing not to vaccinate leaves a reservoir for the disease and prevents total eradication. I'd be delighted if I'm proven wrong and we manage to eradicate Covid-19. I'm just personally skeptical compliance will be high enough to do it considering the anecdotal data just watching people wear masks now, which is frankly a much lower bar.