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‘Practically impossible’ to keep COVID-19 variants out, officials say, as flights from hotspots continue
mutations of COVID-19 out of the country, Canada’s top doctors warned on Wednesday.Since April 6, more than 100 international flights landing in Canada have carried at least one positive COVID-19 case on board, according to the federal government.“We know that, with viruses, it’s practically impossible to prevent new variants from arriving here in Canada,” said deputy chief public health officer Dr. Howard Njoo, speaking in French during a COVID-19 update on April 21.