COVID-19 vaccine boosters becoming available for all adults in Canada.Dr. Neil Rau, who is also an assistant professor of medicine at the University of Toronto, said on The Roy Green Show on Sunday that Canada has to be “pragmatic” when it comes to how we distribute the boosters.He argued that the current vaccine offers one to three months of preventing transmission of the virus before the “immunity starts to wane,” therefore one booster wouldn’t prevent spread for too long of a time.“You can’t have a situation where people aren’t current every three months,” he said.