As was announced earlier this fall, Canada has joined the COVAX facility. The COVAX facility is a multilateral initiative with the World Health Organization and the global vaccine alliance to procure vaccines on behalf of member countries who have decided to join and also on behalf of lower-income countries who wouldn't be able to make those purchases on their own. Canada has joined as a self-financing country and as well has made a significant contribution to the advance market commitment to support low-income countries in receiving and then distributing the vaccines, once they become available.
On November 17th, 2020. See this statement in context.