If somehow we were able to get everyone in the country-symptomatic or not-tested we would have a fairly accurate data base upon which to determine if we stay the course or begin to lift "some" of the restrictions. If we can project the presumptive death rate at significantly over the existing death rate of the flu then we continue on with our present restrictions. OTOH if we can accurately project the same rate as significantly lower than the flu's rate we can start incrementally lifting our restrictions. But even with a provable vaccine, down the road, we don't know if it will apply to the three strains of COVID-19 that we have identified.