OTTAWA—Canadian health authorities are keeping a watchful eye on European investigations of the Oxford-AstraZeneca vaccine after reports of blood clots following inoculations, but say there is no evidence they were caused by the vaccine.
At least nine European countries hit pause on their use of AstraZeneca’s doses—some entirely, and others only on specific batches—pending further investigation of blood clots, though none suggested there is a link between the clots and getting the vaccine.