有科学家认为他们的研究“证实”了AZ疫苗诱发针对血小板的自免疫反应的生理机制:
https://www.npr.org/sections/coronaviru ... -clot-link
但是因为人数太少,离一般意义上的证实还很远,需要进一步研究。
Not everyone, including the European Medicines Agency, is convinced that the cause of these clots has been found.
On Friday, the EMA said that there is "no increase in overall risk of blood clots" among people who've gotten the AstraZeneca vaccine. The European regulator said it had reports of 25 clots so far among the roughly 20 million people who've received the AstraZeneca shot. The EMA, however, didn't rule out a possible connection entirely. "A causal link with the vaccine is not proven," the EMA said in a statement, "but is possible and deserves further analysis."
EMA 上星期发布的结论是,不能排除导致血栓的可能性,但是好处超过了副作用的风险,医护人员需要警惕,如有凝血异常或血小板数量下降的现象需及时治疗。
https://www.ema.europa.eu/en/news/covid ... lood-clots
A causal link with the vaccine is not proven, but is possible and deserves further analysis.
Overall the number of thromboembolic events reported after vaccination, both in studies before licensing and in reports after rollout of vaccination campaigns (469 reports, 191 of them from the EEA), was lower than that expected in the general population... However, in younger patients there remain some concerns, related in particular to these rare cases.
需要注明的是就算是有风险也是极小的几率。