美FDA发布强生研发的疫苗分析报告:能预防中度至重度新冠感染

2021-03-07 中国新闻网 中国新闻网

美国食品和药物管理局(FDA)24日发布一份分析报告称,美国强生公司旗下杨森制药公司研发的新冠候选疫苗能预防中度至重度新冠感染,符合FDA规定的紧急使用授权许可的标准(EUA)。

美国食品和药物管理局(FDA)24日发布一份分析报告称,美国强生公司旗下杨森制药公司研发的新冠候选疫苗能预防中度至重度新冠感染,符合FDA规定的紧急使用授权许可的标准(EUA)。

据美联社报道,这份62页的报告证实了强生制药1月披露的结果,这款名为“JNJ-78436725”的疫苗采取的是单剂疫苗方案,它对预防中度至重度新冠感染的有效性约为66%,对预防严重新冠感染的有效性约为85%。FDA称,该疫苗注射只需一剂,这将有利于加快安全接种速度。

这款疫苗的3期临床试验于2020年9月23日启动,迄今已在美国、拉丁美洲和南非招募4.4万名受试者。

报告称,有证据表明,该疫苗在接种28天后对预防新冠病毒感染有效。报告指出,尚不清楚该疫苗对预防变异新冠病毒的效果。强生公司的试验结果显示,该疫苗在美国的试验中对预防中度至重度新冠感染的有效性达72%,在拉丁美洲和南非的有效性分别为66%和57%。

报告称,接种该疫苗后会出现副作用,包括注射部位酸痛、疲劳、头痛、关节疼痛、发热等症状。报告还称,这款疫苗对不同种族的人有效性和安全性是一致的。

据美国有线电视新闻网报道,FDA的独立顾问小组将于26日召开会议,决定是否建议FDA为这款疫苗颁发紧急使用授权许可。

这是FDA对第三款新冠疫苗进行评估。它是一种重组腺病毒载体疫苗,可以在冰箱(2至8摄氏度)里保存三个月。此前,FDA对德国生物新技术公司和美国辉瑞制药有限公司合作开发的、美国莫德纳公司开发的两款疫苗进行紧急使用授权。它们都是mRNA(信使核糖核酸)疫苗,须冷冻保存。这两款疫苗均采取两剂疫苗方案,其预防新冠感染的有效性约为95%。美联社称,由于不同新冠疫苗3期临床试验的范围、程序等均不相同,其预防新冠感染的有效性无法通过数字作比较。

截至目前,美国已有超过50万人死于新冠病毒感染。由于物流问题和恶劣天气影响,美国疫苗接种速度比预期慢。美国疾病控制和预防中心的数据显示,截至2月24日,美国已分发逾8211万剂疫苗,约6500万人接种至少一剂疫苗,其中近2000万人完成了两剂疫苗的接种。

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    2021-03-08 lqvr
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    2021-03-07 公卫新人

    新冠肺炎,疫情何时才能消失

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