Medicago’s homegrown, plant-based COVID-19 vaccine approved by Health Canada

Medicago’s plant-based COVID-19 vaccine is now approved by Health Canada, which will soon give Canadians the option of getting a homegrown shot against SARS-CoV-2.

Regulators announced the decision to allow its use for adults 18 to 64 years of age on Thursday, making this the sixth vaccine approved in Canada, on the heels of Health Canada’s approval of the Novavax shot last week.

In what the biopharmaceutical company calls a world first, the vaccine from Quebec City-based Medicago uses plant-derived, virus-like particles, which resemble the coronavirus behind COVID-19 but don’t contain its genetic material.

The shots also contain an adjuvant from British-American vaccine giant GlaxoSmithKline to help boost the immune response.

In December, the companies reported high efficacy levels against infection as they geared up for regulatory approval.

High efficacy rate

Dubbed “Covifenz,” the two-dose shot’s overall efficacy rate against all virus variants studied was 71 per cent, with a higher efficacy rate of 75 per cent against COVID-19 infections of any severity from the delta variant, then dominant, according to data shared at the time in a press release.

The results followed a global, Phase 3, placebo-controlled study of the two-dose vaccine that was launched last March. This was before the highly contagious Omicron family of subvariants, including BA.1 and BA.2, began circulating, though the company has said the vaccine can be adapted as needed.

“While additional confirmatory data are needed, preliminary and exploratory data shows that Covifenz produces neutralizing antibodies against the Omicron variant,” noted Health Canada in a statement.

The department has also placed terms and conditions on the authorization. Medicago must continue to provide information to Health Canada on the safety and efficacy of the vaccine, “including protection against current and emerging variants of concern as soon as it is available,” the statement continued.

WATCH | The importance of Canada’s 1st home-grown COVID-19 vaccine:

The importance of Canada’s 1st home-grown COVID-19 vaccine

3 months ago

Duration 4:52

Quebec company Medicago is getting ready to submit data about its COVID-19 vaccine for final regulatory approval, which is a significant step for the pandemic and Canada’s bio-pharmaceutical industry. 4:52

Medicago ‘manufacturing doses’

In October, Canada signed a deal to buy 20 million doses of Medicago’s vaccine, with an option for 56 million more.

In a press release issued on Thursday, the company stressed a commitment to providing its shots as soon as possible.

“The approval of our COVID-19 vaccine is a significant milestone for Canada in the fight against the pandemic. We appreciate Health Canada’s timely review,” said Takashi Nagao, the company’s president and CEO, in the statement.

“We’re also grateful for the Government of Canada’s support in the development of this new vaccine, and we are manufacturing doses to start fulfilling its order.”

For now, the vaccine is only authorized for use in adults 18 to 64 years of age, based on the data that was reviewed by Health Canada.

“There was limited enrolment of participants older than 65 years of age in the clinical trials because a large proportion of older individuals were already vaccinated,” the department said in its statement. “Medicago is currently gathering data in older individuals to support regulatory authorization for this age group.”

WATCH | Plant-based vaccine can be adapted for variants, Medicago says:

1st plant-based vaccine for humans can be adapted for variants, Medicago says

3 months ago

Duration 2:45

Quebec-based biopharmaceutical company Medicago is preparing for its final Health Canada submission on Canada’s first homegrown COVID-19 vaccine. 2:45

Dr. Isaac Bogoch, an infectious diseases specialist based in Toronto, told CBC News the vaccine’s approval is good news, even though it comes after the majority of Canadians are already vaccinated with two or more doses.

“Is this going to have a major impact on us here in Canada? Probably not. But there might be some individuals who choose to get vaccinated with a non-mRNA product,” he said, referring to the shots offered by Pfizer-BioNTech and Moderna.

What’s most hopeful, Bogoch added, is how plant-based technology could help future vaccine development.,

The process developed by Medicago uses the plant species nicotiana benthamiana, a close relative of tobacco plants that is used for pharmaceutical development, largely because of the high number of viruses that can successfully infect it. 

“This might be a pretty unique way to produce and scale vaccination,” Bogoch said.

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