Looks like we're currently hovering around 21.39% and were at 15.26% on 2021-01-31.

6% in ~22 days

At what level are we considered herd immune? When 50.1% of the population is immune/recovered?

It depends on the r value of the virus. A more transmissible virus requires a higher level of population immunity. Most common estimate I've seen for covid is 70-80%

Is it foolish to extrapolate that:

* we are at 20%

* we need to reach 80%

* we have 60% to go

* we got 6% in 22 days

* 60% / 6% in 22 days = 220 days until the country can reopen?

Having no background whatsoever in this area of science, I would imagine that the percentages change over time as some individuals are still going out more or less living their lives and some are holed up extremely risk averse and won't be infected unless their 1 trip to the grocery store per week is compromised.

And it'd be similar for who is readily willing to take the vaccine vs. will refuse to ever do so.