It's based on the data we have from the U.K., from B.C. and from Quebec, where up to eight weeks we see that actually the effectiveness is quite good. As I said, we don't have data for up to four months in terms of effectiveness, but we have modelling data and we have expertise in immunology. It's really a decision that was very hard to make, but—
On March 11th, 2021. See this statement in context.