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Omicron亞型BA.4、BA.5蔓延多國,一份日本研究指出,感染BA.4和BA.5之後恐怕不只是輕症,病毒將更可能侵犯肺部,致病性增加。中央流行疫情指揮中心今(20)日表示,日本的動物研究只是佐證參考,目前沒有明確實證指出新變異株會引發更嚴重的病徵。(記者:陳弋)
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