That's, of course, very interesting because the first dose of the vaccine in people who have been infected is the equivalent of the second dose in people who have never seen the virus. It is something that I actually looked into early on and had discussions about with modellers in Canada and in the U.S. as well. Because of the low rate of infection in Canada, it was deemed that such an approach, other than in settings like long-term care where we know who was infected and who wasn't, is actually quite cumbersome and not very efficient, given that less than 5% of the population has been infected in Canada.
On February 25th, 2021. See this statement in context.