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新變種命名為Omicron 世衛指再感染風險或更高
 

新變種命名為Omicron 世衛指再感染風險或更高

世界衛生組織專家小組開會後,將在南非發現、編號為B.1.1.529的變種新冠病毒,命名為Omicron,並界定為「需要關注的變種」。  

世衛說初步證據顯示,與其他需關注的變種新冠病毒相比,Omicron的再感染風險可能更高;又指在南非,涉及Omicron變種的個案,增長速度比以往幾輪感染更快,代表Omicron變種可能具有優勢。  

對全球公共衛生構成額外風險的病毒株,會被世衛界定為「需要關注」。科學家指出,Omicron變種的刺突蛋白存在大量突變,刺突蛋白在病毒進入人體細胞中,發揮關鍵作用,疫苗亦是以刺突蛋白為目標,因此如果刺突蛋白突變夠多,就令人憂慮病毒可以突破疫苗建立的免疫屏障。

 

資料來源:Yahoo HK (27-11-2021)

選文來自:香港E大夫/醫大夫

 

 

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