she died aged 44 in may after suffering from an unusual brain clot, one of the very rare side effect after an astrazeneca vaccine. researchers at several uk universities have been trying to pin down the risks over the possible side effects, sometimes seen with either the astrazeneca vaccine or the pfizerjab, and then compare them to the risks of getting the virus itself. for every 10 million people vaccinated with astrazeneca, an extra 107 would be hospitalised or die from thrombocytopoenia, which can cause internal bleeding and haemorrhages. but that's nearly nine times lower than the risks of the same condition following natural infection, and crucially, no higher than with other vaccines such as the flu jab. the astrazeneca vaccine also had a slightly higher risk of blood clots in veins, but again, this was 200 times lower than the risk