It's Dr. Ovens. May I comment briefly?
I want to say, in addition, very briefly, that just because you can find the virus on a surface, that doesn't mean it can be transmitted. When we look at the R-naught, it really suggests that the majority of the spread is by droplet contact. There's really very little clinical evidence that this is being spread in an aerosol fashion.
The argument about this can distract from what's really very effective, which is good hand hygiene and very dedicated use of droplet contact precautions with careful coughing.