In terms of the extended interval, the most vulnerable in long-term care facilities, for example, are probably the group we wouldn't be extending. The reason NACI didn't put that out explicitly was that when we spoke to our counterparts, the provinces and territories all said that most of their population was already vaccinated.
However, when we look at data provided by Quebec, B.C. and the U.K., we see that even in those very fragile populations we still have a vaccine effectiveness above 80% up to eight weeks, which does not seem to be declining over time. That was one of the bases on which that recommendation was made.