The 20-30 percent existing immunity isn't built into that chart. The chart is basically just saying "if Moderna, Pfizer, and J&J deliver their promised doses in the promised timelines, and we get 80% of those into arms, this is what it'll look like". So it's not really a "best case" scenario but more of a "if everyone delivers as expected". There is still some upside, if we can get above 80% utilization. It also doesn't include the Novavax vaccine which could be here in late spring in big numbers. You're probably right in that we won't see quite that many in arms by end of May, but we won't be that far off. I'll stick to my guns - just about anyone that wants a shot will have access to one by Memorial Day. Especially in Texas where we're running ahead of the country, and will probably have a lower than average adoption rate.
Yeah, it definitely knows no party lines. There are a ton of them here in New Braunfels. And Austin is one of the worst large cities in the country for unvaccinated kids. But they're going to find themselves in the very small, unsympathetic minority pretty soon. All of us have given up a year mostly to help out the olds and the vulnerable. I'm not sacrificing a single day of normal life for anti-vax morons, and I don't think most normal people will either. Fuck em.