I’ve vaguely wondered the same thing.
IANAD but I assumed that if we all socially distanced and washed hands and wore masks—there could be sick circulating among us, but most of the healthy wouldn’t get sick. That may depend some on how long the virus could live on various surfaces but basically as a tribe we would be ok. Once symptoms cause the individual’s fever, that person could be checked but the potential damage was mostly avoided by those other precautions…we hope.