There is no evidence the AstraZeneca Covid vaccine causes blood clots, the UK’s medicines regulator says after a “thorough and careful review”.
The MHRA says people can have confidence in the vaccine’s benefits and should get immunised when invited, despite some countries suspending use.
But anyone with a headache lasting more than four days after vaccination should seek medical advice, as a precaution.
The same advice applies if someone develops unusual bruising, it says.
That is because the MHRA has received a very small number of reports of an extremely rare form of blood clot occurring in the brain.
The five cases of cerebral sinus vein thrombosis (CSVT), among 11 million people who have received the vaccine, occurred in men aged between 19 and 59. One of the cases was fatal.
