I misunderstood your question. I'll just clarify.
The United Kingdom, for example, right at the outset, looked at a 12-week interval for all the vaccines, and our National Advisory Committee on Immunization has been following not just that data but also domestic data from B.C. and Quebec. We are a leader in the world, particularly in terms of the studies in those two provinces, at looking at that stretch interval, and so far the vaccine effectiveness has been very high, even at that 12-week mark. We're monitoring that very carefully.