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梅斯早读丨CDC:感染奥密克戎病例约占全美新病例的99.9%;辉瑞和BioNTech就针对奥密克戎的新冠疫苗启动临床试验

2022-01-27 MedSci原创 MedSci原创

1、CDC:感染奥密克戎病例约占全美新病例的99.9%

1、CDC:感染奥密克戎病例约占全美新病例的99.9%

 

据美国疾病预防控制中心(CDC)的最新建模数据显示,截至1月22日,感染奥密克戎变异毒株的病例约占美国所有新病例的99.9%。

 

2021年12月初时,CDC估计奥密克戎病例仅占全美新病例的0.6%。预测人员人员估计,目前,感染德尔塔变异毒株病例仅占全美新病例的0.1%。

 

 

2、世卫警告:感染奥密克戎亚型突变株BA.2的病例正在增加

 

当地时间1月25日,世界卫生组织在其网站上更新了一篇文章,称这种奥密克戎亚型毒株名为BA.2,是目前占主导地位的奥密克戎变异毒株的后代。与奥密克戎不同,BA.2目前并不被认为是“值得关注的变体”;但由于它正在许多国家传播,世界卫生组织正在要求全球各国政府和科学家监测这一趋势,并研究这种新的亚型毒株。

 

目前,一些国家已经在这样做了。

 

截至上周五,BA.2已经在包括美国在内的至少40个国家被发现,并已在丹麦和英国迅速传播,早期的报告显示它似乎并不比奥密克戎原始毒株更致命。

 

虽然BA.2是奥密克戎的后代,但它的突变形式略有不同。研究人员已发现奥密克戎存在几个亚型变异毒株,和以前占主导地位的德尔塔变异毒株一样。

 

 

3、北京1月25日新增14例本土确诊病例、5例无症状感染者;北京本轮感染者67例:奥密克戎关联6例,德尔塔关联61例

 

1月25日0时至24时,北京新增14例本土确诊病例(确诊病例1至12昨日均已通报)和5例无症状感染者(无症状感染者1至3昨日均已通报),无新增疑似病例;新增1例境外输入确诊病例和14例无症状感染者,无新增疑似病例。

 

1月25日,北京市召开第275场新冠肺炎疫情防控工作新闻发布会。发布会上,北京市疾病预防控制中心副主任庞星火介绍,1月15日以来北京市已累计报告本土新冠肺炎病毒感染者67例,其中奥密克戎变异株关联疫情累计报告6例均为确诊病例,为轻型。德尔塔变异株关联疫情目前累计报告病例61例,确诊病例47例,其中轻型32例,普通型15例,无症状感染者14例。

 

 

4、张颖:从天津本轮疫情感染者来看,奥密克戎不能被当做“大号流感”

 

1月25日,天津市疾控中心副主任张颖接受采访。张颖认为,奥密克戎是否是大号流感,还需要继续观察,需要更多证据。但从天津这起疫情病例临床表现来看,确实它不能被看作是大号流感。在天津361例阳性感染者里面,有42%是普通型,从临床诊断上来说,普通型无论是轻还是重,是有肺炎的表现。对于疾病来说,如果有肺炎占比能达到42%,就不能等同于大号流感。因为我们都知道流感病毒所造成的疾病是以上呼吸道症状为主,会有慢性基础性疾病的人群,会合并肺炎,细菌性的肺炎或病毒性的肺炎,但比例是远远要少于42%的构成比。就目前天津疫情来说,我个人觉得对它是大号流感持一个观望,还是需要在临床上继续来观察。

 

 

5、辉瑞和BioNTech就针对奥密克戎的新冠疫苗启动临床试验

 

1月25日消息,辉瑞和BioNTech已就专门针对奥密克戎毒株的新冠疫苗启动临床试验。

 

两家制药商周二表示,他们开始在美国和南非招募18至55岁成年人,以检查疫苗的安全性、耐受性和产生的免疫反应。

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    2022-08-05 shock_melon
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    2022-06-15 sunylz
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    2022-01-29 一闲
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