The "best" vaccine? What efficacy numbers mean and why they can be misleading

Millions of Canadians want to know — of the four COVID-19 vaccines approved by Health Canada — which one is the best one? Numbers and statistics are flying around and it's fair to have a lot of other questions. Are the Moderna and Pfizer shots really the 'Cadillac' of vaccines? Is the AstraZeneca shot effective? Does it matter which vaccine you get? We explain what vaccine efficacy really means and why comparing them is like comparing "apples to oranges", the real differences between the 'jabs' and why out of all the numbers, 100% is the big one to focus on. Guest: Dr. Sumon Chakrabarti, infectious disease doctor, Trillium Health Partners Produced by Adrian Cheung, Morgan Bocknek, Sean Pattendon If you would like to support the journalism of the Toronto Star, you can subscribe at thestar.com/subscribingmatters