AstraZeneca vaccine's benefits vastly outweigh risks: Sharma

Health Canada's chief medical adviser Dr. Supriya Sharma says federal regulators are closely monitoring scientific findings about whether the Oxford-AstraZeneca vaccine against COVID-19 can lead to dangerous blood clots in a tiny percentage of recipients. But she says there's clear evidence the vaccine is extremely good at preventing COVID-19 and that vastly outweighs any potential risks.