In terms of mask use, as I just said, the recommendations are made collaboratively with other chief medical officers and the special advisory committee. We reviewed the evolving evidence.
I think it is very reasonable, and I'm sure all the research scientists will agree, that we have to incorporate information as we go along. We incorporated the studies, which were actually not that many but we incorporated them, on asymptomatic and pre-symptomatic transmission, but also the potential for the added layer of protection. I think it's reasonable to bring Canadians along to the latest recommendation.
Recommendations will evolve again, as we know more.