Canada's Ontario stops administering of first doses of AstraZeneca COVID-19 vaccine due to increased blood clot reports (3)

A medical worker prepares to administer the COVID-19 vaccine to a man at a vaccination clinic in Toronto, Ontario, Canada, on May 11, 2021. Ontario, Canada's most populous province, announced on Tuesday it will stop administering of the first doses of the AstraZeneca-Oxford COVID-19 vaccine, effective Tuesday, due to increased reports of blood clots. (Photo by Zou Zheng/Xinhua)