While countries shut borders to travellers from southern Africa fearing the spread of a new strain of the virus that causes Covid-19, vaccine makers were racing to get their hands on it to test if their products will still work.
由于擔心引發新冠感染的一種新型病毒的傳播，各國對來自南部非洲的旅行者關閉了邊境，而疫苗制造商正競相獲取這種病毒的樣本，以測試他們的產品是否仍然有效。
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