Yes. Actually, in my career I had an opportunity to work at Dalhousie University, and I know Dr. Halperin from that period some time ago. More recently, in my time at the National Research Council, we had discussions related to his work at the Canadian vaccination centre—he is, in fact, a pivotal part of the Canadian research community in that way—so, yes, I do know and I have spoken with Dr. Halperin.
On March 22nd, 2021. See this statement in context.