I have the same question Wayne asked and I asked it in the longest CV thread going.
http://forums.pelicanparts.com/off-topic-discussions/1050915-corona-virus-no-joke-82.html#post10785820
Nobody has answered it. Unless we can consistently have R0 < 1, I don't see how it doesn't flare up again. A vaccine will do it (1+ year out) or maybe it mutates to a milder strain that gets everyone immune without taking out as many people.
I am afraid we will be in some sort of lock down for the next 1.5 years or until everyone has had it.
G