EMA finds 'clear' link between AstraZeneca vaccine and blood clots

European drug regulator is to update its recommendation on the shot having previously said it was safe

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A senior official from the European Medicines Agency (EMA) has said it is clear" there is a link between the Oxford/AstraZeneca vaccine and a rare blood clotting syndrome, but that the cause is not yet known.

In my opinion, we can say it now, it is clear there is a link with the vaccine," Marco Cavaleri, the European drug regulator's head of vaccines, told Italy's Il Messaggero newspaper. But we still do not know what causes this reaction."