given what I heard from today's press conference at National Jewish, I'm neither surprised that he travelled (mostly because he had big plans and I think the doctors probably didn't underscore flight risks - considering what they must've told him when he was sputum-negative, that he was extremely low risk of communicating the disease...), nor am I surprised that he flew back (he didn't know the strain until he was there and figured not getting back to the US was a death setence. fwiw, this is probably true. Consider also that the CDC told him they would not allocate funds for his transfer, so he was going to be stuck in Italy...)

Given that he's still sputum negative, it's unlikely he was ever at risk of transmissibility to other patients. We'll see - he's damn lucky about that, too. That could've changed at any point during the trip!

As for the father-in-law - that thought had crossed my mind. From what I understand though, this strain isn't contagious like wildfire - I think you need to be somewhat immunocompromised