Thank you.
Thank you, Mr. Therrien, for being with us today. You're giving us very important testimony.
I'm looking at the accountability principle. It mentions, “If effectiveness of the application cannot be demonstrated, it should be decommissioned and any personal information collected should be destroyed.” On the question of effectiveness, I spoke with an epidemiologist today who was saying, because of the long gestation period of this virus, it's very hard to determine whether tracing would be effective.
How would we look at effectiveness of tracing as an example?