强生“超级”疫苗上市,只需一针就有强大抗体

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美国强生公司近日发布最新COVID-19疫苗数据,其实验性新冠疫苗在单剂接种后至少能诱发71天的免疫反应。这意味着一剂疫苗就足以预防新冠病毒。对此,美国埃默里大学卡洛斯•德尔里奥教授表示,如果强生疫苗真的可以实现单剂免疫, “那该疫苗无疑将成为全世界范围内首选疫苗”。

继辉瑞Pfizer 和 Moderna 疫苗之后,强生公司研发的试验性新冠疫苗,有望在2周内获得FDA批准,成为全美第三种获批新冠疫苗。由于强生疫苗仅需注射一剂,一旦获得批准,它对于抗疫来说,将起到至关重要的作用,它将在10-14天左右快速看到结果。到目前为止,强生疫苗的早期数据是积极的。

一期试验的数据显示,90%以上的受者在接种疫苗后29天内可以诱导出称为中和抗体的免疫系统因子,这些抗体水平与康复后的患者相同。中和抗体非常重要,因为它们的作用是阻止感染。在第57天,不同年龄段的所有人体内都能检测到中和抗体,在18-55岁年龄段的志愿者体内,抗体能稳定存在至少71天。这是研究中测量的最长时间。注射疫苗常见的副作用如发热、疲劳、头痛、肌肉酸痛和注射部位疼痛,这些在只接种一剂疫苗的老年人以及接种较低剂量疫苗的老年人中比较低。

最新《新英格兰医学杂志》上的研究数据显示,在18至55岁以及65岁及以上的健康成年人中,接种了高剂量或低剂量的疫苗,其他人被接种安慰剂。强生单剂新冠病毒疫苗是安全的,在年轻和老年志愿者中产生了有效的免疫反应。

强生首席科学家保罗•斯托菲尔斯表示,与其他领先的新冠肺炎疫苗相比,强生疫苗一剂可以产生更多的中和抗体,相当于其他疫苗的两剂;如果两个月后注射第二剂强生疫苗,中和抗体的数量将增加三倍。

斯托菲尔斯说,强生的目标是使疫苗的有效率达到60%,他认为有望超过70%,甚至达到90%。美国政府官员表示,如果新冠肺炎疫苗的有效性能超过50%,则被认为是成功的。

斯托菲尔说,这是一个好消息,该公司仍在评估接种一剂疫苗后的免疫持续时间,以及是否需要更高的抗体水平来克服新的变异疾病菌株。他说,这个实验的数据显示,一次接种可以在体内产生持久的抗体,这让强生公司有信心他的疫苗“高效”。

最重要的是,这种方案能够覆盖更多的人群。例如,Moderna计划今年生产10亿剂疫苗,但这只会覆盖5亿人。强生公司承诺每年提供10亿剂疫苗,这将足以让10亿人获得免疫。与辉瑞疫苗相比,强生疫苗还有另一个优势。强生疫苗可以在冰箱温度下保存至少3个月。

业内一些顶级传染病专家也在密切关注强生疫苗,因为它有望成为世界上第一种仅用一剂就能保护人类的新冠肺炎疫苗,有望简化大规模疫苗接种的任务。而且可以在冰箱里保存3个月,保存条件没有辉瑞和Moderna疫苗高。强生公司预计在下个月初获得最终阶段的明确疗效数据,有4.5万名志愿者,将在3月前获得授权。

但强生也表示,如果加快审批流程的每一步,该公司的疫苗仍有可能在2月底前获得紧急使用授权。据悉,加拿大与强生公司签订的协议至少涉及到3800万剂的疫苗,强生一旦在加拿大获得批准,预计将成为加拿大第三种获批新冠疫苗!强生疫苗原本被人们寄予厚望,但由于其研发环节发生延误,在市场上多支疫苗已经开始使用后,现在终于姗姗来迟!
 
我就想问加拿大能拿到么,辉瑞美国产根本不给加拿大,Modena也没消息了。
 
这个疫苗的测试数量还太小。再等等。
 
加拿大拿到了,一针解决。
 
因为它有望成为世界上第一种仅用一剂就能保护人类的新冠肺炎疫苗


陈薇的单针腺病毒疫苗已经上市。


1614967489374.png
 
拿到合同就算拿到了。 :p

现在我们要期盼在拜登的领导下,美国5月底实现“想打疫苗的就有疫苗”的目标。。。。

然后,Trudeau向拜登求援,看在兄弟战友的情谊下,优先供给加拿大强森疫苗。

到时候,我们就有救了。
 

How approval of Johnson & Johnson's 'one and done' COVID-19 vaccine could change Canada's vaccination game​



Canada set to purchase up to 38 million doses of single-dose vaccine approved on Friday​

lauren-pelley.JPG

Lauren Pelley - CBC News

Posted: 5 Hours Ago
Last Updated: 2 Hours Ago

1231217101
A health-care worker holds the Johnson & Johnson COVID-19 vaccine in South Africa during a vaccination campaign at Steve Biko Academic Hospital in mid-February. (Phill Magakoe/AFP/Getty Images)

A one-dose COVID-19 vaccine is now approved for use in Canada — and vaccine experts say the shot from Johnson & Johnson could give a major boost to countrywide vaccination efforts while offering a "real solution" to hasten the end of the pandemic.

Health Canada authorized its use and released details during a Friday morning announcement.

The vaccine, made by a subsidiary of Johnson & Johnson, is a non-replicating viral vector option and, unlike the three other vaccines previously approved for Canadian use, was tested during clinical trials as a single shot.
 

How approval of Johnson & Johnson's 'one and done' COVID-19 vaccine could change Canada's vaccination game​



Canada set to purchase up to 38 million doses of single-dose vaccine approved on Friday​

lauren-pelley.JPG

Lauren Pelley - CBC News

Posted: 5 Hours Ago
Last Updated: 2 Hours Ago

1231217101
A health-care worker holds the Johnson & Johnson COVID-19 vaccine in South Africa during a vaccination campaign at Steve Biko Academic Hospital in mid-February. (Phill Magakoe/AFP/Getty Images)

A one-dose COVID-19 vaccine is now approved for use in Canada — and vaccine experts say the shot from Johnson & Johnson could give a major boost to countrywide vaccination efforts while offering a "real solution" to hasten the end of the pandemic.

Health Canada authorized its use and released details during a Friday morning announcement.

The vaccine, made by a subsidiary of Johnson & Johnson, is a non-replicating viral vector option and, unlike the three other vaccines previously approved for Canadian use, was tested during clinical trials as a single shot.

  • Darren MacDonal
August 30, 2020 - "Ottawa announced it has signed a separate deal with a subsidiary of New Jersey-based drug conglomerate Johnson & Johnson to secure up to 38 million doses of the company's potential vaccine"

March 5, 2021 - "So far, Canada is expecting 10 million doses, with options to purchase up to 28 million more if necessary, with most of those shots set to arrive by the end of September."
 
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