Mr. Chair, I'll respond and then turn to Arianne Reza.
The United States government, through its Operation Warp Speed, was focused on supporting the research and development of the vaccines, working with those companies. Elements of those included purchase commitments.
The Government of Canada launched the vaccine task force in May 2020, and it provided outstanding recommendations to us, which allowed for the initial agreement with Moderna to be signed in July 2020—one of the first in world with Moderna.
I would note that we received submissions from the companies for regulatory approval in the fall of 2020, at the same time or shortly linked to the time—