There are a couple of things about that. One is that early on in the spring we did have notices that were given to everybody. When you did come back, you would have noticed general information about the flu and how to prevent its spread, etc., in Canada early on, but now it's widespread, in all communities. Really, the border issues are meaningless.
The key issue, as it always is in terms of the quarantine service and the work with airlines and others, is that if they see severely ill people they will call the quarantine officer and there will be an assessment. For the general population, it's not like you're going to bring influenza to Canada, because we already have it.
The other point is that temperature scanners were used in SARS. They were proven to be pretty much useless. It gives a sense of doing something, but it doesn't actually accomplish anything.
It's the same with having people screened directly by individuals or questionnaires: (a) it's easy to avoid and (b) you may not be sick this instant but in three hours you're coming down with it and already have spread it.
It really is much more about the general information that we have out there for the public about what to do and what to look for. It's the information that's being shared with households and is available generally and on websites. It's about what to look for, when to worry, and when to get attention, etc. That's been clearly shown to be much more effective.
A few countries do intensive screening. That is generally not very effective. It has the potential to be effective very early on if you're not actually seeing cases in the country, but with something like influenza...and not the temperature scanning, but the other questionnaires, etc. But something like influenza very quickly spreads. Also, those in the southern hemisphere are not in their flu season now, so they will need to be getting geared up for their winter season when it comes.
Paul?