EXCLUSIVE Canada's Ontario to expand use of AstraZeneca COVID vaccine as epidemic rages ReutersAlberta identifies Canada's second vaccine-related blood clot 660 NEWSAstraZeneca could have COVID-19 vaccine against variant by end-2021 -Austrian newspaper ReutersCanada records second case of rare blood clot after AstraZeneca shot Medical XpressS. Korea begins administering health care workers for the disabled, seniors, veterans, flight ...