What are the signs and symptoms of the blood clots that have been linked to the AstraZeneca vaccine?


Science Editor Tom Clarke gets the answers from the authority on the subject: Prof Marie Scully, who first spotted the rare side effects in a patient at University College London Hospital.

She explains to Tom how her medical breakthrough has already changed the way patients are being treated, and outlines why these blood clots are so rare and differ from other clots experienced by users of the pill, for example.

Plus, Prof Scully explains why British tests show a different reality to our European neighbours on the potential impact of the clotting - and why it's vital that people are not deterred from still getting vaccinated.