We are about to perform a small and hopefully negative experiment on the contagiousness of Wuhan Coronavirus. Our houseguest received the email from Tiger this evening. It explains that she shared aircraft with one of the now confirmed cases, albeit not on the same flight, some days ago.
(Update) A little reading this morning suggests Coronavirus might hang around on stainless steel and other surfaces from 5 - 28 days at 20C and low relative humidity, at least according to one published paper. If that were proved correct, unfortunately by Tiger, then all but essential travel on public transport might need to be reconsidered. I doubt that anything will happen, it seems too far fetched.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2863430/