The World Health Organization is clarifying statements its chief scientist made on the safety and effectiveness of mixing and matching COVID-19 vaccines, after comments at a media briefing were taken out of context and caused confusion. That sparked concern among some readers about Canada's vaccination approach, which includes mixing vaccines. WATCH | Dr. Isaac Bogoch clarifies advice on mixing vaccine doses:Infectious disease specialist clarifies confusion over mixing vaccine doses CBC News 2:44 Dr. Isaac Bogoch says that Canada's approach to mixing COVID-19 vaccines is safe and effective. 2:44Swaminathan said guidance on mixing and matching vaccines needs to come from public health agencies — which is exactly what is happening in Canada. Canada has been mixing and matching COVID-19 vaccines for weeks based on emerging research from Spain and the United Kingdom that found combining AstraZeneca with Pfizer shots was both safe and effective at preventing COVID-19.

Source: CBC News July 13, 2021 23:03 UTC