Greater Seoul under threat of further spread, high alert over ‘silent’ virus spreaders

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SEOUL, June 4 (Yonhap) — New virus cases in greater Seoul continued to rise Thursday amid a steady increase in cases linked to religious gatherings, putting health authorities on high alert over further spread in the densely populated metropolitan area amid concerns over asymptomatic “silent” virus spreaders.
The country added 39 more cases of the new coronavirus, including 33 local infections, raising the total caseload to 11,629, according to the Korea Centers for Disease Control and Prevention (KCDC).
All of the newly identified domestic transmissions were reported in Seoul and adjacent areas.
A day earlier, the country reported 49 COVID-19 cases, snapping four consecutive days of fewer than 40 new infections.
Church-linked transmissions in Seoul and surrounding areas have been a new source of concern for health authorities, along with cases from clubgoers in the nightlife district of Itaewon and an e-commerce giant’s warehouse.
As of Thursday, the number of cases tied to 30 small churches in Inc.eon, west of Seoul, and Gyeonggi Province that surrounds the capital city reached 66, up 11 from a day earlier, according to the KCDC.
Of the cases reported from the churches, more than half were secondary transmissions.
The number of infections from clubgoers in Itaewon reached 272, and 120 cases were linked to the distribution center run by Coupang, according to the KCDC.
Over the past two weeks, cluster infections accounted for nearly 72 percent of newly added cases, while some 9 percent remains unclear over their infection routes. A whopping 96 percent of the cases over the period came from greater Seoul.
“If the situation in greater Seoul shows no signs of an improvement, we would need to take tougher actions,” KCDC Director Jeong Eun-kyeong said in a daily briefing. “Before there’s a vaccine, the country will go through strict or relaxed social distancing schemes depending on the development of the pandemic.
The so-called reproduction rate, or R-number, for COVID-19, a gauge that reflects the average of number of people getting infected by a patient, currently stands at around 1.2 for the nation, according to the KCDC. The figure was around 0.5 before the outbreak in Itaewon.
Numbers for the capital city and neighboring areas, in particular, have been moving up, with the infection rate currently standing at 1.9. This figure translates into one patient infecting two others that can easily lead to an exponential spike in sick people in relatively short period of time.
“Any reading above 1 indicates that a patient is transferring the virus to at least one person. In order to put the pandemic under control, we are currently making efforts to lower the figure to around 0.5,” Jeong said.
A spate of cluster infections has forced health authorities to enhance quarantine measures in the metropolitan area, home to half of the country’s 50 million population, which will be in place until June 14.
South Korea may consider going back to strict social distancing if the country’s virus curve does not sharply flatten by the deadline.
Health authorities are particularly concerned about a steady rise in “hidden, silent” virus spreaders in the metropolitan area, as those who come into contact with such people are at risk of contracting COVID-19 unwittingly from asymptomatic virus carriers.
The KCDC estimates around 25-35 percent of patients here tested positive for the coronavirus despite showing no related symptoms.
A large number of the patients linked to church gatherings have shown mild or no symptoms. Some 70 percent of the patients reported from one of the churches in Incheon showed no signs of the virus as well, according to the KCDC.
“It is possible that South Korea may continue to experience the sporadic spread of the virus through such silent virus spreaders until an effective vaccine becomes available,” Yoon Tae-ho, a senior health official, said in a daily briefing.
Yoon stressed that residents of the metropolitan area should refrain from having gatherings at least until the weekend.
In sync with eased social distancing that began in early May, South Korea rolled out the third phase of its plan to reopen schools, with first-year high school students, second-year middle school students and other selected elementary school students returning to their classrooms.
Schools will continue taking precautionary measures, including staggered lunches, adjusting student attendance, reduced class time, and a mix of online and offline classes.
But some schools, most of them located in the metropolitan area, were forced to delay their reopening as concerns linger.
On Thursday, 511 kindergartens, elementary, middle and high schools, or 2.4 percent of the country’s 20,900 schools, remained shut down. Nearly all but three were based in Seoul and its surrounding areas.
Health authorities are also working to secure remdesivir, which was recently approved here as a treatment drug for the new coronavirus.
South Korea has yet to complete its clinical tests on the new drug by U.S. pharmaceutical giant Gilead Sciences Inc., but local drug safety watchdog earlier said the drug has been proven in many other countries to help reduce the time needed to cure coronavirus patients.
The country reported no new deaths, keeping the death toll at 273.
The fatality rate stood at 2.35 percent, though the figure hovered at over 26 percent for patients aged 80 and above.
The accumulated number of imported cases reached 1,275, up six from a day earlier.
The total number of people released from quarantine after full recoveries stood at 10,499, moving up 32 from the previous day. Around 90 percent of local COVID-19 patients have been cured, according to the KCDC.
Since Jan. 3, South Korea has carried out 973,858 COVID-19 tests, including 17,006 a day earlier. The country reported its first case, involving a Chinese person, on Jan. 20.
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