There were a number of them around the world. All of them were slightly different. Certainly the U.K.'s, which I was aware of, was different. I know the European one also. Basically, they were doing the same function. They were trying to record information on people travelling into the country so that they could trace those contacts—that was particularly important when you were seeing new variants coming in—and allow the public health agencies around the world to be able to track where those individuals had been and how the spread of the new variants was operating.
As well, as the ArriveCAN app progressed, we had the proof of vaccine credential. That was also a very complicated, difficult system, and it was complicated and difficult for us to be able to identify the vaccines and go right back into the provincial health data systems to check that they were valid.