Okay.
The answer is yes, we are seeing preferences.
When we started, basically people wanted any vaccine at all. People were accepting a full range of vaccines. They were getting them from different sources, and they would also accept vaccines that had relatively short shelf lives when they came by donations. That has since changed. Countries that have experience with vaccines have chosen to use a particular vaccine. An example would be the AstraZeneca vaccine, which was very important at the beginning. Recently, there has been less demand for that vaccine—not from all countries, but from some. In particular, countries do not want short shelf life vaccines because they don't give them ample time for planning and making sure they can get the doses out to the periphery. Now COVAX is offering a six-month timeline of doses coming forward. With that, they get to choose their priority vaccines.
Also, in the case of donations, we've asked that donations come with at least two months' shelf time in country so they can be provided as doses.