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COVID Delta variant to dominate within months
Published on: 2021-07-22
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The highly contagious Delta variant of COVID-19 is expected to become the dominant strain of the virus over the coming months, the World Health Organization said Wednesday.

Delta, which was first detected in India, has now been recorded in 124 territories – 13 more than last week – and already accounts for more than three-quarters of sequenced specimens in many major countries, the WHO said.

"It is expected that it will rapidly out-compete other variants and become the dominant circulating lineage over the coming months," the UN health agency said in its weekly epidemiological update.

Of the three other coronavirus variants of concern (VOCs), Alpha, first detected in Britain, has been reported in 180 territories (up six from last week), Beta, first detected in South Africa, in 130 (up seven) and Gamma, first detected in Brazil, in 78 (up three).

According to SARS-CoV-2 sequences submitted to the GISAID global science initiative over the four weeks to July 20, the prevalence of Delta exceeded 75 percent in several countries.

Those included Australia, Bangladesh, Botswana, Britain, China, Denmark, India, Indonesia, Israel, Portugal, Russia, Singapore and South Africa.

"Growing evidence supports the increased transmissibility of the Delta variant as compared to non-VOCs. However, the exact mechanism for the increase in transmissibility remains unclear," said the WHO.

德尔塔将成全球主要流行毒株

世卫组织网站最新数据显示,截至欧洲中部时间20日18时42分(北京时间21日零时42分),全球确诊病例较前一日增加390026例,达到190671330例;死亡病例增加6424例,达到4098758例。

世界卫生组织20日发布的全球疫情周报分析显示,鉴于新冠变异病毒德尔塔毒株在传播方面的优势,预计这一毒株将很快超过其他变异毒株,在未来数月成为全球主要流行毒株。

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