THAT is the correct scientific definition of herd immunity.
Or used to be before the WHO changed the long-standing definition to when "everyone gets vaccinated," which is scientifically incorrect.
I did find April 16 is the day that would be the stupid bug that is when the daily coronavirus conference is no longer featured Dr. Deborah Berks or Dr. idiot Fauci
The morons convinced Trump to do the 15 days to slow the spread they Marshall the federal resources brilliantly figure the whole thing out and started talking about opening up America again on that date
As we know this entire thing is just a giant communist/Democrat plied to take out Donald Trump and usher in the hundreds of millions of “mail in” ballots which secured his fraudulent defeat
This fact however remains. Fraud vitiates everything
No, it’s not. It historically has been used when R0 drops below 1 due to enough of the population having said virus (ie the level of which the virus starts to burn itself out as the next wave is fewer than the previous). What % of the population you need to have had it depends on what the “core” R0 is.