Name: Covid 的 Delta 变体如何在全球范围内快速传播（How Covid’s Delta Variant Quickly Spread Globally | WSJ）
Uploaded: 2021-07-24T06:34:10.000Z
Duration: 5 min 10 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

- [Narrator] A COVID-19 variant first detected

情態副詞

and been detected in nearly 100 countries

As of July, more than 80% of known COVID cases

in the US are caused by the Delta variant.

- The Delta variant is currently the greatest threat

in the US to our attempt to eliminate COVID-19.

- The Delta variant is both more transmissible

- [Narrator] Studies have shown that some COVID vaccines

are effective at preventing symptomatic illnesses

where a large part of the population is vaccinated.

Even countries that have been previously spared

to understand why the deadly outbreak of Delta

is not just threatening the economic recovery

but also the return to normal around the world.

By the spring, the number of cases in India

Thousands and thousands of new infections every day.

- [Narrator] Public health experts blamed

There were political rallies for state elections

There was also a religious festival in April

when millions of Hindus gathered to bathe

what really helped accelerate the case load

was Delta variant's molecular composition

and its nine key mutations in the protein spikes

Mutations on these spikes allow the varies

By June 1st, the variant wasn't only in India

- We're seeing cases growing by about 64% per week

- [Narrator] What surprised health officials

was that around 75% of the adult British population

had already received at least one dose of a vaccine

- The UK's a really unfortunate situation.

There are good levels of vaccination there

- [Narrator] And that was partly because vaccines

at preventing symptomatic illnesses caused by Delta.

- The more the Delta variant is allowed to spread,

which would evade the vaccines or evade treatments.

And we'd kind of almost be back to the beginning.

in part because they had been spared the brunt

Australia and Thailand imposed lockdowns.

Even Japan decided to ban spectators at the Olympics

Not many people in the population are vaccinated.

And this is the huge concern about this variant.

That it's just going to rip through these countries.

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Covid 的 Delta 变体如何在全球范围内快速传播（How Covid’s Delta Variant Quickly Spread Globally | WSJ）

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