To clarify: I meant "the right choice" given the information, ideas, and means they had available at the time. Not "the right choice if everything was possible and known".
The CDC wasn't circulating the same facts that South Korea and Singapore were dealing with. Do you remember what Asia was doing in February? The CDC basically created this disaster. We could have shut down air traffic, told the public to use masks in February, and allowed universities and private labs to conduct testing. Instead the CDC lied.