Mixing doses could also wind up being a useful approach in the months ahead, according to Dr. Christopher Labos, a Montreal-based cardiologist and epidemiologist. "Especially because we want people to get their second doses," he said. A woman walks by a sign advertising for COVID-19 vaccines in Montreal on May 14. WATCH | Dr. Tam discusses second doses, mixing vaccines:Tam talks about AstraZeneca second doses and mixing vaccines Politics News 1:34 Dr. Theresa Tam, Canada's chief public health officer, says the government will ensure that people can get their second doses of AstraZeneca's COVID-19 vaccine and Health Canada will continue to review studies on mixing vaccines. He also noted that preliminary results from a U.K. study suggest using different vaccines for different doses could even offer a "better immune response."

Source: CBC News May 17, 2021 07:52 UTC