As I said, it's a constantly moving target. As you know, the whole vaccine landscape is constantly changing, which vaccines will be available and where. I'm sure this is not surprising. It's an incredibly complex process. When you're talking about vaccine readiness, you're talking also about ensuring our whole supply chain is in place.
In certain countries, certain vaccines might work more effectively just based on their infrastructure. There's a lot going on. I don't think we have all the information. That might be part of the frustration, that all of the information in terms of how exactly this will all roll out is as complicated as what we hear in Canada. It's very similar; it's constantly changing.