The other question mark to the uninformed like me--transmission. Airline passengers and crew in the immediate proximity of Corona patients have not caught the disease, despite not knowing that precautions should have been used. All 19 people who brought Corona to the Hawaiian islands left, and so far, there has been no fall out. In Italy, with stringent isolation policies in place, Corona deaths are continuing to escalate after more than a month of quarantine. South Korea, who does industrial strength cleaning of all public places daily, but does not have quarantine (that I know of) has quelled the outbreak.
Airplanes probably have better air circulation (and better filters) than many places (busses and trains for instance). I do not know of any airline crew who have tested positive, but that does not mean that there are not any. I think that crew are more likely to be exposed, as they travel and move about airplanes much more than passengers. I do think that the worry about transmission via surfaces is much more than it needs to be, the majority of cases appear to be by direct respiratory transmission by respiratory droplets, unfortunately in some cases apparently by people who do not appear to be (or feel) sick. This could be from talking, not only sneezing or coughing. The data so far show that the majority of transmission is in families and in medical settings (where people are very sick and are producing a lot of virus). I do not know about the Hawaiian situation, I suspect that there are possibly many cases there that have not been detected yet. Italy's stringent isolation was probably too late (the virus has quite a long incubation period, so what we are seeing in hospitals now is due to infections that happened weeks ago). South Korea has excellent testing and is isolating and quarantining people who are known to have the virus, since they have much better testing than we do, this is a strategy that works. We know so little about who has the virus and who does not here, that general isolation procedures are probably our best bet.