Herd immunity is nearly upon us!
Been hearing that since May. It wasn’t true then and it isn’t true now. R0 for SARS-CoV-2 is 2.5. HIT is 1-1/R0 or 60%. Roughly 12% of the US population has or has had an infection with SARS-CoV-2. We’re 1/5th of the way to the HIT, which is still not exactly the end; more like the beginning of the end.
We’ll get there when a safe and effective vaccine is introduced. EUA should be available for at least one by the end of the month and probably 2 by the end of the year. That will cover front-line healthcare workers, which will have a solid impact on transmission rates.