The benefits of AstraZeneca’s vaccine still outweigh the risks, the European Medicines Agency (EMA) said in a press release. Still, the agency’s safety committee said it’s important to know the signs of a possible clot.
A blood clot occurs when the blood thickens and forms a semi-solid mass. It can be a helpful response to stop bleeding in the case of injury, but these blockages can cause problems if they cut off blood flow to a vital area.
Blood clots can cause blockages in the legs, abdomen, and lungs. Most of the blood clots associated with the AstraZeneca vaccine have occurred in veins in people’s brains.
These clots, known as cerebral venous sinus thrombosis (CVST), can lead to stroke, seizures, and death.
So far, most of the clots reported have occurred in women under 60 years of age within two weeks of vaccination.