Well, first of all, let's talk about all those who are close contacts. Their family members: clearly, they are all at risk from this unknown positive. We know there is cohort mixing, unfortunately, in isolation facilities. All those other cohorts are put at risk by this unknown positive. If we look at a study that I'm hoping to come to shortly, a Nicholas Steyn and Shaun Hendy study, they say one of our biggest risks in our whole border policy configuration is the number of people that are interacted with—they say about five—in managed isolation. Imagine if one of them was the unknown positive.