The stadium nicknamed the Big O has been transformed into a site aimed at inoculating almost 3,000 a day, equipped with wheelchairs and golf carts to help those unable to walk, organizers said.
"There are people who are coming out of their home for the first time since the start of the pandemic," said Caroline St-Denis, director of the vaccination campaign at the stadium.
Canada's vaccine supplies are expected to get a boost after health regulator on Friday approved AstraZeneca's COVID-19 vaccine, becoming the third shot to be available to Canadians.
That will help as provinces begin targeting elderly residents beyond those living at the long-term care facilities which accounted for the majority of COVID-19 deaths during the first wave.
With less than 4% of the population inoculated so far, the pace of Canada's slow campaign has caused frustration, resulting in at least two senior corporate executives resigning for trying to jump the vaccine queue.
"We are going to have everyone vaccinated probably by the end of the summer," Trudeau told NBC News's Meet the Press on Sunday.
In Manitoba, which plans to enlist chiropractors, massage therapists and optometrists, more than 300 dentists, or about 40% of registered dentists in the province, have joined the vaccination effort, said Dr. Marc Mollot, past president of the Manitoba Dental Association.
The western province of Alberta has started using pharmacies in Edmonton, Calgary and Red Deer to administer vaccines to people aged 75 and over, but the province's health services website initially crashed after more than 150,000 people logged on.
"It's been 10 long months in this pandemic, people’s nerves are worn raw by nearly a year of restrictions, a year of uncertainty, frustration, stress and anxiety," Alberta health minister Tyler Shandro told reporters last week.
While the country's most populous province Ontario will not launch a centralized booking system until March 15, some public health units have already started booking elderly patients.
Quebec's campaign at the stadium gets underway during the province's spring break, amid fears that a variant of the novel coronavirus could spread during the holiday. The Quebec government is wrestling with plans to bring elderly residents to inoculation sites like the stadium since the Pfizer vaccine's cold storage requirements make it impossible to transport the vaccine to individual homes.
Quebec has also reached agreements with pharmacists and businesses to expand inoculations in the coming months.
Other provinces are ramping-up staff recruitment with British Columbia issuing orders last week allowing health care workers like dentists and midwives to administer vaccines.
"Vaccines are our ticket out of the pandemic," Alberta health minister Shandro said.
(Reporting By Allison Lampert in Montreal. Additional reporting by Nia Williams in Calgary, Rod Nickel in Manitoba, Moira Warburton and Allison Martell in Toronto Editing by Denny Thomas and Nick Zieminski) ((Allison.Lampert@thomsonreuters.com; 514-796-4212; Reuters Messaging: firstname.lastname@example.org))