Looks like the data is going to be examined from every angle, and should be. Is there anyone looking at the impact of travel? People are arguing about the exact date that travel to China was stopped, but given how ubiquitous travel is everywhere would it have had much impact to do it sooner? Canada stopped/controlled travel to China, I forget on which date, but about a million Canadians returned from abroad in the last few weeks. Isn't that kind of a wash from the point of view of risk?
It seems kind of impossible to isolate any one region of the globe after the fact, although some travel slowdown might aid in curve flattening. That is to say, it's just one more facet not necessarily a critical one. Is this sensible or am I missing something?