As the president already indicated, those very specific processes are still being planned. What I do know, given my communication with the World Health Organization, is that China is not letting anyone leave Wuhan, so there's that sort of containment. Anyone who leaves—and that case is extraordinary—has active screening before being allowed to get on a plane, because they don't want to let anyone out of the city. There is actually strict screening before anyone can board a plane and leave.
The rest of the very specific processes we are undertaking are still being planned. The underlying public health principle is that we have to assess individual risk, I believe. Maybe they're not all the same. We will have to look at the details of individuals who are potentially on that plane.
What I'm talking about, of course, is the measures we have right now for any traveller coming back from the affected area, which include isolating the people who are ill with respiratory symptoms. Their contacts are monitored, so there is that sort of quarantine, if you like. Anyone who isn't sick who comes in does not get quarantined if they haven't been in contact with a case. That's the general public health protocol. We will be leaning on that as part of the guidance as we examine exactly what we're going to do with passengers on any potential flight.