If there’s a car on the railroad tracks, do you move it out of the way ... or do you make everyone stay off the road indefinitely just because they MIGHT stop on the railroad tracks?
You put up rail road crossing arms, so that people are temporarily kept off the track when the train is coming through.
That's what we have done with CV. We're keeping them off the tracks until the train passes. Or in this case, until we are better able to mitigate the spread and treat the virus.