新冠肺炎疫情持續，全球確診人數突破2000萬，各國都加緊研發治療藥物及疫苗。最近美國有研究發現，在一些從未感染新冠肺炎人士的體內，發現竟有能辨識新冠病毒且並產生免疫反應的免疫細胞，專家相信是曾感染其他冠狀病毒引起的傷風感冒，而獲得免疫反應。
美國加州拉霍亞免疫學研究所早前作出研究，分析研究的血液樣本發現，在8成新冠肺炎患者及部分從未染疫的人士體內，有可以識別部新冠病毒且並產生免疫反應的T細胞，表示部分人可能在一定程度上能對新冠病毒免疫。
T細胞是免疫系統重要一環，可以辨識與對抗曾被感染的細胞，再以過去類似的感染經驗，來保護人體產生抗體作免疫。研究人員相信，在沒有染疫的人士體內 T 細胞能作出免疫反應，因為過去曾染上其他冠狀病毒引起的傷風感冒而獲得。
約翰斯霍普金斯大學健康安全中心博士Amesh Adalja亦表示，雖然T細胞不能阻止人類受感染，但研究可以解釋部分患者受感染後病情輕微，更寄望此研究結果能幫助新冠疫苗研發。
來源：cnn、mercury news；圖片：pexels、unsplash
▼緊貼最新疫情消息▼
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