欧盟EMA发现强生新冠疫苗可能与血栓有关,但表示获益大于风险

2021-04-20 JACKZHAO MedSci原创

欧洲药品管理局周二表示,美国强生新冠疫苗可能与罕见的血凝块事件有关,但重申其健康获益仍然超过了风险。

A box of Johnson & Johnson's Janssen <a href='https://www.medsci.cn/search?q=COVID-19'>COVID-19</a> vaccine doses are pictured at Grubb's Pharmacy on Capitol Hill on Monday, April 12, 2021.

欧洲药品管理局周二表示,美国强生新冠疫苗可能与罕见的血凝块事件有关,但重申其健康获益仍然超过了风险。该机构在新闻稿中说:“ EMA的安全委员会(PRAC)得出结论,应在其旗下杨森新冠疫苗产品信息中添加有关低血小板的异常血块的警告。”

https://www.ema.europa.eu/en/news/covid-19-vaccine-janssen-ema-finds-possible-link-very-rare-cases-unusual-blood-clots-low-blood

“医疗专业人员和将要接种疫苗的人员应注意,在接种疫苗后三周内可能会发生非常罕见的血凝块并伴有低水平的血小板的情况。”新闻稿称,EMA研究了所有可用的证据,包括来自美国的八份关于异常血液凝块的严重病例的报告,其中之一具有致命的后果。截至4月7日,在美国已有超过700万人接种了该疫苗。

美国食品和药物管理局(FDA)本月初决定,出于“谨慎考虑”,暂停使用强生公司的注射剂。结果,这家制药公司决定推迟在欧洲推出其疫苗,而监管机构则评估了任何风险。

EMA上周已经表示,在审查最新细节时,仍然认为疫苗的益处大于风险。强生新冠疫苗接种只需要做一剂,最初于3月11日在欧盟为其开绿灯。现在,有待观察的是不同的国家如何解释EMA的最新指南。法国已经表明它将只对55岁以上的人使用这种疫苗。

今年一月底揭盲的3期研究ENSEMBLE发现杨森新冠肺炎候选疫苗在预防中重度新冠肺炎方面具有较好保护效力和安全性,在来自不同地区的所有受试者中,包括感染新出现的变异病毒的受试者,杨森的新冠肺炎候选疫苗在接种28天之后预防中重度新冠肺炎的总体保护效力为66%。最早在第14天观察到预防作用。接种28天之后,对中重度新冠肺炎感染的保护水平,在美国为72%,拉丁美洲为66%,南非为57%。

 

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    2022-02-13 haouestc
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    2021-04-22 fengyi812
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    2021-04-21 公卫新人

    新冠肺炎,疫情何时才能消失

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