Grace Hatton If you think about the virus for a moment and assume some of the claims that tens of thousands are already infected, but mostly not showing symptoms, that would suggest that in a week or two all those thousands of people would probably be just as immune as if they had been vaccinated. Some of this will take care of itself. Remember West Nile Virus? Today probably tons of folks have antibodies to it.
If we are to assume that the ChiComs are correct in that they are pretty much past this, that would probably explain it. A big "if", though.