Britain’s medicines regulator the Medicine and Healthcare Products Regulatory Agency said it is reviewing the reports but, “given the frequency at which blood clots can occur naturally, the evidence available does not suggest the vaccine is the cause”.
Speaking from the House of Commons, Prime Minister Boris Johnson assured MPs the vaccine is “safe and works extremely well”.
He said: “I could tell from the excitement of the scientists that this was promising and that the Oxford-AstraZeneca vaccine looked as though it would work.
“After exhaustive tests, so it has proved.
“That vaccine is safe and works extremely well, and now, only six months later, it is being made in multiple places from India to the US, as well as Britain, and it is being used around the world.”