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WATCH LIVE | Health officials hope new Omicron vaccine will improve uptake of COVID-19 boosters

Health Canada approved on Thursday the use of the Pfizer-BioNTech COVID-19 booster vaccine that targets the BA.4 and BA.5 strains of the Omicron variant. It is the second combination vaccine greenlighted by Health Canada's vaccine review team, but the first that targets the virus strains that are now most common in Canada

Booster shots of the Pfizer COVID-19 vaccine are displayed during a vaccine clinic in Townshend, Vt., on Tuesday, Sept. 20, 2022. Canada approved the shot on Oct 7. (Kristopher Radder/The Brattleboro Reformer via AP)