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Пресс-релиз (BBC News)

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게시 날짜 2020-03-19
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Coronavirus in South Korea: How 'trace, test and treat' may be saving lives

By Laura Bicker

BBC News, Seoul

https://www.bbc.com/news/world-asia-51836898#share-tools

In a car park behind a hospital in Seoul, 45-year-old Rachel Kim rolls down her car window and sticks out her tongue. She travelled to Daegu last week, the area with the highest number of coronavirus cases in South Korea.

Now she's developed a bad cough and a fever. Fearing the worst, she decided to get a Covid-19 test at one of the dozens of drive-through centres. Two people dressed head-to-toe in white protective clothing, clear goggles and surgical face masks are ready for her.

A long swab stick is rummaged around the back of her mouth and throat and then placed carefully into a long test tube.

Then comes the tough bit. The swab goes right up her nose. She screws up her eyes in discomfort, but the whole thing is over in minutes. She rolls up her car window and off she drives. She will get a call if the result is positive, or a text if it's negative.

Negative pressure room

Nearly 20,000 people are being tested every day for coronavirus in South Korea, more people per capita than anywhere else in the world.

Rachel's sample is quickly shipped off to a nearby laboratory where staff are working 24 hours a day to process the results.

In the battle to contain the contagion, these labs have become the front line. South Korea has created a network of 96 public and private laboratories to test for coronavirus.

Health officials believe this approach may be saving lives. The fatality rate for coronavirus in South Korea is 0.7%. Globally the World Health Organization has reported 3.4% - but scientists estimate that the death rate is lower because not all cases are reported.

I turned up at Green Cross laboratories just outside Seoul as a new batch of samples arrived to be tested. Dr Oh Yejin gave us a tour until she stopped at a door and made it clear we were not allowed through.

"The tests are carried out in this negative pressure room," she told me. "It prevents any droplets from the samples escaping."

Inside, two doctors in bright yellow protective clothing are moving around the sealed room. They lift up a number of test tubes and get to work.

Beside us dozens of machines are whirring away and processing results. These are PCR (polymerase chain reaction) tests - in very basic terms it is searching for the presence of Covid-19 in the sample.

The whole process from test tube to test result is about five to six hours.

Lessons from Mers

Professor Gye Cheol Kwon, the chairman of the Laboratory Medicine Foundation, calls this the Korean "bali bali" gene. Bali means quick in Korean. He says this because the South Koreans managed to design and create a test, set up a network of labs across the country and get it all to work in 17 days.

But this has come from bitter experience.

"We learned the risk of new infection and its ramifications from the experience of the Middle East Respiratory syndrome (Mers) back in 2015," he told me. Thirty-six people died in South Korea during the Mers outbreak.

It forced the country to reassess its approach to infectious diseases. South Korea's Centres for Disease Control even set up a special department to prepare for the worst. In this case, that preparation appears to have paid off.

"I think that early patient detection with accurate tests followed by isolation can lower the mortality rate and prevent the virus from spreading," said Prof Kwon. "To learn from the past and prepare systems in advance… that might be the true power to overcome this new kind of disaster."

It had been quite quiet for the team at Green Cross until early February when a patient - now known in South Korea as "patient 31" - with no known history of travel and no contact with previous cases tested positive for the virus.

She belonged to the Shincheonji Church of Jesus, a religious sect with over 200,000 members. It led to a race to find the source of the outbreak and trace everyone affected. South Korea's labs were put to the test. Fatigue among staff has been an issue. Now they work shifts and Dr Oh tells me, delightedly, that she is finally able to get some sleep.

There is no shortage of testing kits in South Korea. Four companies have been given approval to make them. It means the country has the capacity to test 140,000 samples a week.

Prof Kwon believes the accuracy of South Korea's Covid-19 test is around 98%. The ability to test so many people has made the country a role model as others look to battle their own coronavirus outbreaks.

But there have been missteps too.

At least two patients died waiting for a hospital bed in Daegu, the worst affected city. The initial reaction was to quarantine everyone infected with the virus in a hospital bed, but now the doctors have learned to treat those with mild symptoms in residential centres and leave the clinical beds for those needing critical care.

"We can't quarantine and treat all patients. Those who have mild symptoms should stay home and get treated," Dr Kim Yeon-Jae, an infectious disease specialist from the Korea National Medical Centre told me.

"We should change our end goal strategy to lower death rates. So other countries like Italy, that see huge numbers in patients, should also change their strategies as well."

Are South Korea's alerts too revealing?

Why did infections shoot up in South Korea?

S Korea sect leader apologises for virus spread

Is China getting back to business?

Wherever the virus hits in large numbers - makeshift test centres follow.

This week in Seoul, there was a mass infection at a call centre. Medics set up outside and quickly took swabs from hundreds of staff in the building.

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