I agree that the start line matters, as does how quickly you get up to speed. The finish line, of course, also matters, but the combination of changes of behaviour, availability of rapid diagnostics, availability of therapeutics and availability of vaccines are all very important tools. We need to use all of them. It's not one or the other; we need a combination of all those tools together.
I would say that in Canada the approval of these vaccines and the therapeutics absolutely has to happen more quickly, and not only the federal approval, and also the use of them in being drawn down by the provinces. We have antibody-based therapeutics approved by Health Canada that are not being deployed and not being used by the provinces. I know that the therapeutics task force also has opinions on that. They believe that they are being underutilized and that they definitely need to be rolled out as quickly as possible.
Concerning the shelf life of these vaccines, they're very stable, although I'll pass it over to James, who's more of a technical expert on that subject.