Thank you, Mr. Chair.
I am hopefully going to play the role of Mr. Oliver quite well and not embarrass myself.
First of all, thank you all for coming and speaking today. I had a number of questions that have been asked and answered, so thank you for that. The presentation was very thorough. There were a couple of things that we went through fairly quickly just to clarify, so I may be asking questions you may have answered already. I want to echo Mr. Webber's comments. I was relieved to hear some of the things today already about the severity and the risk level for Canadians. There is a bit of a sensational component sometimes with the media, and I was pleased to hear what I've heard so far with regard to the level of threat.
That's actually my first question. From PHAC's perspective, you've identified the level of threat to Canadians as very low. I'm just curious. How do you measure threats like this, and is it different each time? Is there a particular standard that's applied? What defines “very low”, versus “low” to “medium”, “high”, and so on?