Researchers in the US have discovered two new variants of coronavirus, one of which they say has became the dominant strain in the state of Ohio’s capital, Columbus, within just three weeks.
美國研究人員發現了兩種新型冠狀病毒新變種,他們稱其中一種已在短短3周內成爲俄亥俄州首府哥倫布(Columbus)流行的主要毒株。
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