The problem is that that is not necessarily what science or history tell us. The human race as does a rather poor job at building herd immunity to respiratory viruses as a whole-and corona viruses. Immunity to influenza is transitory and requires annual vaccination-three is no herd immunity other than what is confered by those vaccinations-otherwise you can catch it every single year. One can have what we refer to as a common cold more than once a season let alone once a year. The primary causes of common colds are adenoviruses, rhinovirus and a corona virus. There is only transitory immunity to any of those. For herd immunity to be effective about 70 percent of the population has to have antibodies. This corona virus has a high R0 and if immunity is, as other viruses of this type, transitory, it will take an annual vaccination program participated in by 70 percent of the world population to eradicate it. The likely hood of that happening, particularly in the current antiscience environment is nil. The best that can be expected is that enough people develop transitory immunity in this pandemic to knock it back to a manageable level while we develop a vaccination program. Since we know there are mutations occurring there will of course be times when, like influenza, it s more virulent than others. It will likely never go away but one hopes we can develop reasonable treatments that will mitigate the symptoms and reduce, at least in the majority of years, the death rate to an acceptable level. No we can not leave our economy on hold for ever, or even for much longer,, but every day we give science time to find the treatment that will let those to do get infected live and provide more data on the type of immunity that is confered-the better off the world will be.