We know that entry screening—into Canada, for example—can never be 100% in terms of stopping any.... This is a virus. It can cross borders.
This is a layer of a multi-layered response. The most important layer, of course, is the initial entry into the health system. We've talked a bit about that. At the actual international border, I see it as a great opportunity to absolutely make someone aware of what to do if they're sick after entry.
In that paper, what I recommended was that.... This is a moment in time; someone is paying attention as they're crossing the border. You can give them the information they need in that moment of education as to what they should do if they get sick.
In that paper, what I did not find effective were thermal scanners. That was a lot.... I think we scanned 6.3 million people, both on entry and exit, and couldn't pick up a case, for a very specific reason, which was that in the incubation period people can be asymptomatic. Also, for other reasons, that was just not.... On that predictive value, if it's rare, you actually don't expect a case. It's actually not very effective. That's the thermal scanning bit, not the education bit.