The findings could lead to new medicines to help people who have inherited blood-clotting disorders that put them at risk for pulmonary embolism, heart attack and stroke.

Scientists believe they may have found the “trigger” behind the extremely rare blood clot complications stemming from the Oxford/AstraZeneca vaccine.

Young people could be at a higher risk from rare blood clots after the AstraZeneca coronavirus vaccine because of their more active immune systems, experts have said.