Canada has now approved four different Covid-19 vaccines after giving the green signal to Johnson & Johnson’s COVID-19 shot. Johnson & Johnson’s single-dose shot joins a growing arsenal of vaccines that include shots from Pfizer, Moderna and AstraZeneca to protect Canadians against COVID-19.

The approval is expected to grant a significant boost to Canada's vaccine rollout. Johnson & Johnson's vaccine is extensively seen as one of the easiest to administer because it requires only one dose and can be stored for long periods of time at regular refrigerator temperatures.

The US healthcare giant's vaccine is the fourth to be approved in Canada. Earlier, Canada approved the use of Pfizer-BioNTech, Moderna and AstraZeneca vaccines."Canada is the first country to approve four vaccines," said Dr. Supriya Sharma, Health Canada's chief medical advisor, at a press conference Friday morning.

It is approved in Canada for use in individuals aged 18 and older. Canada has been assessing the Johnson & Johnson shot since November 30 last year.

It has ordered 10 million doses from Johnson & Johnson with options for up to 28 million more. Most of those shots are expected to arrive by the end of September this year.

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