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July 22, 2021
Uncategorized

美本土已發現三種變種新冠病毒

美科學家發布報告稱,他們發現了三種本土産生的新冠病毒變種。科學家認爲,隨著全球新冠病例激增,「超級冠狀病毒」變種只會變得越來越普遍。

南伊利諾伊大學卡本代爾校區研究人員14日稱,他們發現了新冠病毒的新變種,這一變種最早於去年5月份在德州出現,可能比其他變種更容易傳播。研究人員稱這一變異病毒可能已經成爲全美最主要的變異毒株。

此前一天(13日),俄亥俄州立大學的研究人員發布報告稱,他們發現了「可能源自美國的兩種新冠病毒變種」,其中一種與在英國發現的變異新冠病毒相似,另一種則與英國或南非發現的變異新冠病毒不同。

科學家認爲,世界上感染新冠病毒的人越多,出現的變種就會越多。隨著病例的增加,更多的病例將受到慢性的、長期的感染,這將使該病毒有機會通過感染人體細胞並擊敗免疫系統的方式進行變異。科學家相信,越來越多的人感染新冠病毒,就會出現更多這種高度傳染性變異。

疾病管制與預防中心(CDC)今天警告說,起源於英國的一種更具傳染性的新冠病毒變種,可能在3月份之前成爲在美國流行的主要毒株。

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