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文章来源:admin    时间:2021-01-13

  World Health Organization (WHO) chief scientist Soumya Swaminathan said Monday that herd1 immunity2 to coronavirus would not be achieved in 2021, despite the growing availability of vaccines4.   世界卫生安排的首席科学家苏米娅·斯瓦米纳坦周一表明,即便疫苗产值不断添加,也不行能在2021年完成对新冠病毒的集体免疫。   Mitigating5 factors to herd immunity include limited access to vaccines in developing countries, skepticism over vaccination6, and the potential for virus mutations, according to health experts.   A growing number of countries around the world, including the United States, the United Kingdom, Singapore, Germany and other European Union countries, are in the first stages of mass-vaccination campaigns.   Herd immunity occurs when enough people in a population have immunity to an infection so that it prevents the disease from spreading.   "We are not going to achieve any levels of population immunity or herd immunity in 2021," Swaminathan told a briefing, while emphasizing that measures like physical distancing, hand washing and mask wearing continue to be necessary in containing COVID's spread for the rest of the year.   However, Swaminathan commended the "incredible progress" made by vaccine3 researchers to develop several safe and effective vaccines at unprecedented7 speed. Countries are currently administering vaccines developed by BioNTech-Pfizer, Oxford8 University/AstraZeneca and Moderna.   The WHO top scientist called on people to be "a little patient," pointing out that the rollout of vaccines "does take time," as the scale of dose production is in the billions.   "The vaccines are going to come," she said. "They are going to go to all countries ... but meanwhile we mustn't forget that there are measures that work," she added, referring to hygiene9 and social distancing.
1 herd      n.兽群,牧群;vt.使会集,把…赶在一同 参阅例句:
  • She drove the herd of cattle through the wilderness.她赶着牛群穿过荒野。
  • He had no opinions of his own but simply follow the herd.他从无主意,仅仅随声附和。
2 immunity      n.优惠;革除;豁免,豁免权 参阅例句:
  • The law gives public schools immunity from taxation.法令革除公立学校的交税责任。
  • He claims diplomatic immunity to avoid being arrested.他要求外交豁免以便防止被捕。
3 vaccine      n.牛痘苗,疫苗;adj.牛痘的,疫苗的 参阅例句:
  • The polio vaccine has saved millions of lives.脊髓灰质炎疫苗挽救了数以百万计的生命。
  • She takes a vaccine against influenza every fall.她每年秋季接种流感疫苗。
4 vaccines      疫苗,痘苗( vaccine的名词复数 ) 参阅例句:
  • His team are at the forefront of scientific research into vaccines. 他的小组处于疫苗科研的最前沿。
  • The vaccines were kept cool in refrigerators. 疫苗放在冰箱中冷藏。
5 mitigating      v.减轻,平缓( mitigate的现在分词 ) 参阅例句:
  • Are there any mitigating circumstances in this case ? 本案中是否有任何情况能够减轻被告的罪过? 来自辞典例句
  • A sentencing judge is required to consider any mitigating circumstances befor imposing the death penalty. 在处死刑之前,要求量刑法官有必要考虑是否有任何减轻罪过之情节。 来自白话例句
6 vaccination      n.接种疫苗,种痘 参阅例句:
  • Vaccination is a preventive against smallpox.种痘是防备天花的办法。
  • Doctors suggest getting a tetanus vaccination every ten years.医师主张每十年打针一次破伤风疫苗。
7 unprecedented      adj.无前例的,别致的 参阅例句:
  • The air crash caused an unprecedented number of deaths.这次空难的逝世人数是空前的。
  • A flood of this sort is really unprecedented.这样大的洪水真是十年九不遇。
8 Oxford      n.牛津(英国城市) 参阅例句:
  • At present he has become a Professor of Chemistry at Oxford.他现在已是牛津大学的化学教授了。
  • This is where the road to Oxford joins the road to London.这是去牛津的路与去伦敦的路的集合处。
9 hygiene      n.健康法,卫生学 (a.hygienic) 参阅例句:
  • Their course of study includes elementary hygiene and medical theory.他们的课程包含根底卫生学和医疗常识。
  • He's going to give us a lecture on public hygiene.他要给咱们作关于公共卫生方面的陈述。

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