TORONTO : A national panel of vaccine experts in Canada recommended Wednesday that provinces extend the interval between the two doses of a COVID-19 shot to four months to quickly inoculate more people amid a shortage of doses in Canada.A number of provinces said they would do just that.Prime Minister Justin Trudeau also expressed optimism that vaccination timelines could be sped up.
And Health Canada, the country's regulator, said emerging evidence suggests high effectiveness for several weeks after the first dose and noted the panel's recommendation in a tweet.