Great news.
However, IMHO the CDC is whitewashing what is known about the details of transmission.
They are particularly optimisitic about the fever threshhold and the incubation period. These are statistics and probabilities, not guarantees. We should be extra-cautious with something as lethal as this virus.
And yet they "inform" us that it isn't contagious until symptoms are present.
All the lil viri stay behind the cell wall line till the starter pistol goes off now.
Also the CDC now considers micro droplets as tiny floating surfaces, but it's not airborne.