If we were halfway rational, we would have started this in January. Failing that, start now.
This is pure hindsight. This didn't warrant that kind of response in January, not by a longshot. In January it looked exactly like the other comparatively minor respiratory viruses that pop up every few years. We can't shut down industry and retool factories just in case.
Also, for H1N1 (which ended up being much less deadly) Obama had a million tests made in the first 2 weeks from the first US case. We're now 2 months from the first US case with less than 20k tests done.