It's good to know, as you said, that we were able to lead the world in expanding to the four months. It would be great to know that we're able to take that information on the mixing of vaccines, because people are going to be very concerned about it.
I saw yesterday that Albert Bourla, the CEO of Pfizer, said that a third COVID vaccine dose is likely needed within 12 months. I was just curious about what the procurement plans are as far as that is concerned. Is that 12 months from the time we get the second dose, or is that 12 months from when the first dose was administered?