Name: Wuhan Lab Hypothesis or Animal-Human Leap? The Hunt for Covid-19’s Origins | WSJ
Uploaded: 2021-07-24T08:39:34.000Z
Duration: 9 min 18 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

a virology lab, and a mine deep in the mountains.

Key events at these places in China could be crucial

to understanding how a small cluster of coronavirus cases

into this global health crisis, politicians and scientists

- [Betsy] If you're gonna look for the origin of a pandemic,

you really should start right away when the clues are fresh.

Right now that's looking pretty difficult.

- [Narrator] That's because access to Wuhan

10 miles away is where some scientists believe

that the virus may have accidentally leaked from a lab.

have an increasingly important connection to one place

to break down what we know about the coronavirus

to understand how the global pandemic may have started.

Stop number one, the Huanan Seafood Market,

about a cluster of pneumonia cases in Wuhan.

And increasingly, the focus was on the market.

The complex spans an area that's the size

of nine football fields and has over 600 stalls.

About 10 of those were selling wild animals

like bamboo rats, hedgehogs and hog badgers.

- [Betsy] These wildlife are raised on farms,

where it's easy for animals to spread viruses back

and the viruses start to mix and match and can change.

that are receptive to coronavirus infections

either for food or used in traditional medicine.

- [Betsy] These animals are shipped to urban markets

where they are sold sometimes live and butchered onsite.

And all this contact with live possibly infected animals

has become a major concern in recent years.

- [Narrator] And in Wuhan, many of the first cases

were either vendors who worked at the market,

By January 1st, Chinese authorities shut the place down.

- [Betsy] Well, originally Chinese authorities did feel

that it possibly came from the Huanan Market

scientists in Wuhan and Beijing published

a pivotal paper in the medical journal, The Lancet.

This chart shows how some of the early cases

were people who hadn't been at the market.

More than a year later, there was new data

a group of international scientists to come to Wuhan

for several weeks to visit the market and hospitals.

- [Betsy] A team from the WHO that visited China

that they knew it wasn't all coming from the same place.

of early cases not linked to the market could suggest

that it was not the original source of the outbreak.

And increasingly, one place a team visited

and does a lot of work with scientists outside of China,

very vibrant collaboration before the pandemic.

They would travel to caves where bats are known to roost

and take samples, and then study them in their lab.

- [Narrator] These bat coronaviruses and pathogens

The researchers used this library of information

And about a month after the market was closed,

these researchers discovered that COVID-19

had a 96.2% genetic match with the bat coronavirus

that the institute had found back in 2013.

Scientists around the world consider this

a breakthrough in the search for COVID-19 source,

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Wuhan Lab Hypothesis or Animal-Human Leap? The Hunt for Covid-19’s Origins | WSJ

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