Here's why Canadians have reason to be more optimistic about the COVID-19 vaccine rollout

Comparing apples to oranges isn't necessarily useful if you're trying to learn more about apples. And that is exactly what some experts say is happening in recent discussions of Canada's vaccine rollout performance on the world stage.

This country's vaccination recordcan seem disappointing when compared to the quick progress in some other countries, but that may not be a fair comparison, some experts say. The fact is certain key metrics suggest Canada's rollout performanceis actually on the rise compared to those of many other countries.

"It really does matter who you compare Canada to," said Trevor Tombe, an associate professor of economics at the University of Calgary and a research fellow at its school of public policy.

How we evaluate Canada'sperformance, he said, is by comparing ourselves to other major countries and by "using realistic metrics based on Canada's current rollout strategy."

At the beginning of March, the National Advisory Committee on Immunization (NACI) recommended that the interval time between first and second doses for the Moderna, Pfizer-BioNTech and AstraZeneca-Oxford COVID-19 vaccines be extended to a maximum of four months.

The group doubled down on that recommendation this week, saying the extension will allow more people to receive a first dosemore quickly. And the Council of Chief Medical Officers of Health publicly announced its support of the interval recommendation the same day.

Tombe said that extension is the reason why Canadians should be sure they are really comparing apples to apples, so to speak, when we look at our numbers internationally.

Comparing Canada to the world based on the metric of how many people have received at least one dose of vaccine paints the most accurate comparative picture right now, he said,given the country has focused its efforts on administering first doses.

By those markers measuring the Canadian vaccine rollout to other major economies and looking at the percentage of the population that has received at least one dose this country is doing better than average.

Canada is third in the G7, behind only the United States and United Kingdom. Canada also ranks third when compared to members of the G20 (with data not available for Saudi Arabia and China). And those same metrics put us in the top 10 out of 37 members of the Organisation for Economic Co-operation and Development (OECD).

Scott Halperin, the director of the Canadian Center for Vaccinology in Halifax, agrees that comparing Canada's "fully vaccinated" rate with the rest of the worldis not the best measure of the country's immunization progress right now.

"When you have a policy of first dose completion, that's the metric you want to use because it's a conscious policy," he said.

"When you make a conscious decision not to give the second dose for another three or four months, then your two-dose completion rate is going to stall for that three or four months."

Halperinand other expertshave pointed out the dearth of vaccine supply in February and early Marchwas caused mostly by a lack of capacity inCanada to manufacture vaccines on a mass scale, a situation created by decades of policy-making decisions.

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"You can only do as well in rolling out the vaccine in terms of how many vaccine doses you have," he said. "And the leaders in rolling out the vaccines, except for a small number of exceptions, are countries who already had manufacturing capacity and invested very heavily in those vaccines."

But in the here and now, he said, working with what Canada has to work with, the rollout is ramping up at a pace that matches supply.

The rationale behind the strategy

Dr. Caroline Quach-Thanh, the head of NACI, says she responds to criticisms of Canada'svaccination recordwith a similar recounting of facts. She saysthe lack of vaccine supply is a factor that influenced hergroup's decision to recommend extending the time gap between first and second doses, which is part of what led to Canada's seemingly poorperformance on the world stage when comparing "fully vaccinated" numbers.

"What we've decided to do in Canada is to give one dose to as many people as possible," she said. "I know that that decision, that was taken by Canada and the provinces, has led to a lot of anger and anxiety in some people.

"It's very complicated for some people to understand that better protection for all is eventually going to be better protection for them as well."