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US President Joe Biden said in an interview aired on Sunday that it will be difficult for the United States to reach herd immunity by the end of this summer.
美國總統拜登在週日播出的採訪中表示，美國很難在今年夏天結束前達到群體免疫力。
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Herd immunity has reached when a large portion of the population has developed immunity toe a virus.
當大部分人對一種病毒產生免疫力時，就達到了群體免疫力。
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Top U.
頂尖的U。
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S infectious disease expert Dr Anthony Fauci has said 75% of Americans have to be vaccinated to reach her immunity.
S傳染病專家安東尼-福齊博士說，75%的美國人必須接種疫苗才能達到她的免疫力。
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In an interview with CBS aired on Sunday, Biden acknowledged that quote.
在週日播出的CBS採訪中，拜登承認了這句話。
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The idea that this could be done and we can get to herd immunity much before the end of this summer is very difficult.
這個想法是可以做到的，我們可以在今年夏天結束之前達到群體免疫力，這是非常困難的。
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As of Sunday morning, the Centers for Disease Control said the US had administered just over 41 million doses of CO vid 19 vaccines and distributed just over 59 million doses, according to a Reuters tally.
根據路透社的統計，截至週日上午，美國疾病控制中心表示，美國已經接種了4100多萬劑CO vid 19疫苗，分發了5900多萬劑。
