A recent survey found that just over eight-in-10 Canadians are up for another jab and would be willing to take a booster shot after their first two COVID-19 vaccine doses within the next year. Israel is considering giving a third Pfizer vaccine to people over 60 to fend off the Delta variant, while U.S. and European authorities are considering whether booster shots are needed. Pfizer, meanwhile, is seeking emergency authorization in the U.S. for a third dose of its vaccine.