【#每日跟讀單元 K142】舊金山將成美首座達群體免疫之大城
👉老師唸給你聽: https://15minsengcafe.pse.is/3huk2n
摘要:
Throughout the pandemic, the vaccination goals to hit herd immunity have been a moving target, a briefing from Yale School of Medicine notes, with experts initially estimating that the virus would have difficulty spreading if 60 to 70 percent of the population was immune. With several variants in circulation, some of which are more contagious, the estimates have been climbing. Many experts now estimate that herd immunity will be achieved when 80 to 90 percent of residents have been vaccinated.
耶魯大學醫學院的一份簡報指出，對於要達到群體免疫所需接種疫苗的目標數量，因應疫情而始終在變動。專家最初估計，若百分之六十至七十的人口免疫，病毒將難以傳播。現已有數種變種病毒，有些傳染力更強，因此估算出來，應達到的目標一直在提高。許多專家現在估計，當百分之八十至九十的居民接種了疫苗後，就會達到群體免疫。
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