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In today's Morning Brief, we have the story that Canada is changing its guidelines on mixing and matching second doses of COVID-19 vaccines.

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Canada to recommend mixing and matching AstraZeneca, Pfizer and Moderna COVID-19 vaccines

Canada is changing its guidelines on mixing and matching second doses of COVID-19 vaccines and will advise Canadians to combine either the AstraZeneca-Oxford, Pfizer-BioNTech or Moderna shots interchangeably in certain situations.

The National Advisory Committee on Immunization (NACI) will update its guidance to provinces and territories in the coming days and recommend that a first shot of the AstraZeneca vaccine can be followed by Moderna or Pfizer, according to sources with direct knowledge of the decision who spoke to CBC on condition of anonymity.

For Canadians who have had a first dose of Moderna or Pfizer, NACI will recommend they can now take either of the two shots as a second dose — because they both use a similar mRNA technology.

The updated NACI guidance is based on emerging research from Spain and the United Kingdom that found mixing and matching AstraZeneca and Pfizer vaccines was both safe and effective at preventing COVID-19.

WATCH | Mixing the COVID-19 vaccines:

Mixing the COVID-19 vaccines

2 years ago
Duration 1:15

The recommendation will have a major impact on Canada's vaccine rollout, with current NACI guidelines stating that a vaccination series that begins with AstraZeneca should follow up with the same shot and that mRNA vaccines should only be used interchangeably if the same first dose is unavailable or unknown.

The updated guidelines follow moves by some provinces to combine different shots due to issues with the supply of AstraZeneca and a rare but serious type of blood clot that can result after the shot called vaccine-induced immune thrombotic thrombocytopenia (VITT). Read more on this story here.

Unrest continues in Colombia

TOPSHOT - A demonstrator clashes with riot police during a protest against the government of Colombian President Ivan Duque, in Facatativa, Colombia, on May 31, 2021. (Photo by Raul ARBOLEDA / AFP) (Photo by RAUL ARBOLEDA/AFP via Getty Images) (Raul Arboleda/AFP/Getty Images)

(Raul Arboleda/AFP/Getty Images)

A demonstrator throws a smoke canister at riot police during clashes that erupted during a protest against the government of Colombian President Ivan Duque, in Facatativa, Colombia, on Monday. The country has seen more than a month of protests against the social and economic policies of the Duque government.

In brief

Prime Minister Justin Trudeau says more supports for survivors of residential schools are coming following the heartbreaking report of the discovery of children's remains in Kamloops, B.C. What those federal supports will look like is still unclear. Trudeau said he was to meet with some of his cabinet later on Monday to discuss next steps to aid survivors and the community. "People are hurting and we must be there for the survivors," he said. "Sadly, this is not an exception or an isolated incident. We're not going to hide from that. We have to acknowledge the truth. Residential schools were a reality — a tragedy that existed here, in our country, and we have to own up to it." Read more on this story here.

WATCH | Trudeau promises support for residential school survivors amid calls for action:

Trudeau promises support for residential school survivors amid calls for action

2 years ago
Duration 2:04

It's a bit harder to qualify for a home loan as of today as the federal government has raised the minimum financial bar that anyone applying for a mortgage must meet. Ottawa raised the level of the so-called "stress test" for mortgages today, setting the new level at 5.25 per cent — or two full percentage points above the borrower's mortgage rate, whichever is higher. That's an increase of about half a percentage point from where it was before. Launched in 2017 to cool down the overheated market of the time, the stress test is a minimum threshold that anyone applying for a home loan in Canada has to meet. It doesn't make the loan itself any more expensive. Rather, it ensures anyone getting a mortgage will be able to pay it off if rates go up. Read more about the change to the mortgage "stress test."

A review of the military justice system — ordered by the Trudeau government before the current crisis over sexual misconduct in the ranks descended on the chain of command — is being released to the House of Commons this morning. Requested by the Liberal government last fall, the review by former Supreme Court justice Morris Fish was drafted against the backdrop of an extraordinary meltdown in confidence in the chain of command related to sexual misconduct. Fish's independent assessment was given a mandate to examine military police, arrests, the court martial system, punishment, the Code of Service Discipline and how the system handles minor service offences. Read more about the pending report.

Breaking with tradition, at least eight Catholic school boards in some of Ontario's most populous areas have voted to raise the Pride flag at their schools, which advocates say will help LGBTQ students feel more welcome. But there's also been pushback, with some ordained members of the Catholic Church denouncing the decision, arguing it goes too far. Pride flags will fly at schools in several regions including Toronto, Ottawa, Durham, Niagara, Waterloo and Wellington. Some will fly the Pride flag for the entire month, while others will do so just for the first week. The Thunder Bay District Catholic School Board and the Conseil scolaire de district catholique des Aurores boréales began the trend, first flying the Pride flag outside their main office buildings in 2019. Ontario is one of three provinces that fully funds the Catholic school system with taxpayer money; the others are Alberta and Saskatchewan. Read more about the decision to fly the Pride flag here.

Hundreds of activists have returned to camps the RCMP has spent weeks trying to clear to enforce a B.C. Supreme Court injunction allowing a forestry company to continue old-growth logging activities in the Fairy Creek watershed near Port Renfrew, B.C. Since police began enforcing the injunction on May 17, officers have arrested 142 people for breaching the injunction or for obstruction. Nine people have been arrested more than once, according to police. Activists face the potential of jail time and stiff fines if they are found in contempt of court for not obeying the court-ordered injunction. Several activists who spoke with CBC News said if they were arrested, upon release they would return to the area and rejoin the blockades. The Fairy Creek watershed is known for its dense forests, where trees, some as old as 800 years, are prized by the timber industry for their value and quality. Read more here on the protests.

The Montreal Canadiens are moving on in the NHL playoffs after completing their series comeback against the Toronto Maple Leafs on Monday. Montreal netminder Carey Price made 30 saves as the Habs beat the Leafs 3-1 in Toronto. Brendan Gallagher, Corey Perry and Tyler Toffoli scored for Montreal, while Toronto got a late goal from William Nylander. Montreal trailed the series 3-1 before taking the final three games to send Toronto to another first-round playoff exit. The Leafs, who finished first in the North Division this season, haven't advanced to the second round since 2004. Montreal will now face the Jets in Winnipeg starting Wednesday. Read more here from Game 7.

WATCH | Montreal celebrates hockey playoff win over Toronto:

Montreal celebrates hockey playoff win over Toronto

2 years ago
Duration 2:26

Now for some good news to start your Tuesday: When 83-year-old Humayun Mohajer became eligible to receive a first dose of a COVID-19 vaccine back in March, he didn't know where to begin in the booking process. But thanks to PinkCars, a volunteer-run organization in York Region north of Toronto that helps seniors book vaccine appointments and transports them to and from vaccination clinics, the Richmond Hill resident got his first dose of the Pfizer-BioNTech shot in March and was to get his second dose yesterday. PinkCars founder Shanta Sundarason said volunteers with the initiative have booked appointments for about 3,800 seniors and offered more than 400 rides to and from vaccination clinics since the organization's inception on March 1, 2021. Read more about the volunteer group.

Front Burner: Residential school survivors mourn after discovery of unmarked graves

This week, all across the country, memorials were made out of teddy bears and rows of tiny shoes as people gathered to mourn the deaths of Indigenous children who fell victim to one of Canada's darkest national shames — the residential school system. The public outcry followed a devastating discovery: the unmarked graves of children at a former residential school in Kamloops, B.C.

Today, CBC reporter Angela Sterritt joins us to explain how residential school survivors and their families are reacting to the news and how many are demanding action to finally be taken. 

The National Indian Residential School Crisis Line has been set up to provide support for former students and those affected. You can access emotional and crisis referral services by calling the 24-hour national crisis line at 1-866 925-4419. 

Within British Columbia, the KUU-US Crisis Line Society provides a First Nations and Indigenous-specific crisis toll-free line 24/7 at 1-800-588-8717 or online at

Today in history: June 1

1831: The north magnetic pole is first located by England's Sir James Ross during an Arctic expedition

1927: After a six-year "dry" spell, liquor stores open in Ontario.

1968: Alberta's flag is proclaimed by Queen Elizabeth.

2009: A new era at the Canada-U.S. border formally kicks in as those entering the U.S., including American citizens, are required to show a passport before making the crossing.

With files from The Canadian Press, The Associated Press and Reuters

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