‘I think, even if the vaccine or several vaccines are invented in the next few months, which is likely, we still have challenges in manufacturing, distributing and persuading the public to accept the vaccine. And those challenges will take about a year. And, meanwhile, the virus is still spreading, and it will continue to spread until we reach a threshold of about 40 to 50 percent of Americans who are infected. Right now, we're only at about 10 percent. That threshold is known as the herd immunity threshold.
‘So, that will take us into 2022. So, from my perspective, the first period during which we're confronting the biological and epidemiological impact of the virus, and we're living in a changed world, wearing masks, physical distancing, school closures, and so on, will last until sometime in 2022. And then we're going to begin a second period, when we are recovering from the psychological, social and economic shock of the virus. And this has been seen for thousands of years with other epidemics. And that will take a couple of years for us to rebuild our economy and recover.
‘And so, sometime in 2024, I think, life will slowly begin to return to normal, with some persistent changes.’
Read here (PBS News Hour, Nov 12, 2020)