If I suggested to you that it wasn't a concern, that's not what I intended. I would suggest, though, that the medical screening process for tuberculosis actually takes too much effort for the benefit that's derived.
Tuberculosis is an important health problem. I believe—and Natasha can correct me—that it's the most common infectious disease in the world. I think one third of the population of the entire world is infected with tuberculosis.
The issue is that tuberculosis is one of those diseases where we're particularly concerned with its impact when it's in the active phase and in a place where it can be readily transmitted, which is usually the lung or the breathing tract. Those are the cases that we're most concerned with, as those are cases that actually present a risk to others.
So the issue we have in respect of the medical screening process is that it doesn't necessarily help us identify those individuals who are actually presenting a specific risk to other Canadians when they arrive.