First of all, I just want to note that I'm a one-dose AstraZeneca person thus far, and I'm looking forward to a second dose like many other people are.
In that regard, as I mentioned, we have 655,000 additional doses being distributed in real time that will cover all of the demand for people's timelines for second doses all the way through June. As Bill Matthews can speak to, we have other sources of supply lined up in the event there is a desire by the majority of people to continue with the second dose.
As Dr. Tunis was setting out, however, we're also going to have the option—it's quite likely, but not yet substantiated by way of the data—that people could get a second dose of messenger RNA. Therefore, I think everybody who is waiting for their second dose from a first dose AstraZeneca perspective is well looked after. There is supply, we have it now and we will have in fact further options in addition to what's required over the course of the coming weeks.
I don't know, Bill, if you want to add anything on the supply.