Kunnon selitys siitä miksi monet maat laittoivat astrazenecan jäähylle - ei pelkkä huuhaa ylireaktio

Scientists don’t know whether the vaccine causes the syndrome, and if so, what the mechanism is. But vaccine safety officials say they did not take the decision lightly, and that symptoms seen in at least 13 patients, all between ages 20 and 50 and previously healthy, in at least five countries are more frequent than would be expected by chance. The patients, at least seven of whom have died, suffer from widespread blood clots, low platelet counts, and internal bleeding—not typical strokes or blood clots. “It’s a very special picture” of symptoms, says Steinar Madsen, medical director of the Norwegian Medicines Agency. “Our leading hematologist said he had never seen anything quite like it.”

German officials said Monday they had received seven reports of cerebral venous thrombosis (CVT), three of them fatal, in patients who had recently been vaccinated with the AstraZeneca vaccine. In this rare type of stroke, the vein that drains blood from the brain is blocked, which can result in massive, deadly bleeding in the brain. All of the patients also had low levels of platelets, which aid in clotting, a possible sign of more widespread clotting. One affected patient had blood clots “from head to toe,” says Clemens Wendtner, a hematology and infectious disease specialist at the Munich Clinic, Schwabing. The symptoms remind Wendtner of a syndrome called disseminated intravascular coagulation (DIC), in which blood clots form throughout the body, depleting its platelet supply. When the clots cause blood vessels to burst, the body is less able stop the internal bleeding, which can damage the brain or other organs.

https://www.sciencemag.org/news/2021/03/it-s-very-special-picture-why-v…