Certainly, I'd be happy to, and I'll ask Suzanne Therrien to add a bit of the detail.
Right now, when an individual is applying to come.... Any permanent resident must have a medical screening—anyone applying to come to Canada permanently. There will therefore be a situation in which they go and get their medical screening, according to criteria laid out by Canada, in the country they are applying from. That is subject to review by medical officers at the missions. They will make a determination and then provide their assessment to the visa officers so that they have that information to determine whether the person is admissible.