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Virus spreading in South Korea has origin in Europe, US

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The novel coronavirus may have arrived in South Korea via someone who came from Europe or the US. YONHAP NEWS AGENCY/THE KOREA HERALD

Virus spreading in South Korea has origin in Europe, US

The novel coronavirus spreading in South Korea now has its origin in Europe and the US, health authorities said on Monday, and it is known to be six times as infectious as the original strain that emerged late last year.

The variant belongs to the GH clade, which has largely been circulated in Europe and the US, according to an analysis by Korea Centres for Disease Control and Prevention (KCDC) on 526 genome samples diagnosed with Covid-19.

This implies the virus could have arrived in South Korea via someone who came from those regions in March and April before the country tightened virus controls on overseas arrivals, mandating a two-week quarantine for all.

KCDC director Jeong Eun-kyeong told a briefing on Monday: “As we interpret it, the virus belonging to the GH clade is circulating recently because we had many arrivals from Europe and the US in March and April, and the virus imported then is now driving community transmissions.”

She said the variant of the GH group was first found in cases in early April registered in North Gyeongsang province, cases traced to bars and clubs in Itaewon – Seoul’s party district – in early May as well as cases linked to a Buddhist temple in Gwangju, most recently.

The variants found in the genome samples in February and March, when the country saw hundreds of cases linked to a church in Daegu and hospital in neighbouring North Gyeongsang province at the peak of the Covid-19 outbreak in the country, belonged to the S clade and V clade.

The virus in the S and V clades were prevalent in China, where the coronavirus is perceived to have originated from, and other parts of Asia.

The Covid-19 virus is largely classified as S, V, L, G, GH, GR clades, said the WHO-operated GISAID, an international resource for sharing genome sequences.

Among the 526 samples analysed, 333 samples, or 63.3 per cent, belonged to the GH clade, followed by 127 samples classified as the V clade and 33 as the S clade and 19 as the GR clade and 10 as the G clade and four as others, said the KCDC.

The G vibrant, which is dominating Covid-19 cases globally, is three to six times more capable of infecting human cells, said a study published on July 2 in the scientific journal Cell.

Touching on another study result on the possibility of airborne spread of the Covid-19, Jeong said more research is necessary but key measures to fight the virus stays the same regardless of how the virus spreads, calling on the public to stick to the basic rules such as avoiding enclosed, populated environments, wearing masks and washing hands.

In an open letter to be published this week, some 239 scientists from 32 countries suggests that aerosol transmission of the Covid-19 could be more important than the WHO has acknowledged, called on governments around the globe to take control measures.

On Monday, Korea reported 48 more Covid-19 cases as the country continues to see small-scale outbreaks, infections coming from overseas as well as an increasing number of cases with unidentified routes of transmission.

Half of the new cases, 24, were locally transmitted and the other half were imported, said the KCDC. Of the locally transmitted cases, seven were registered in Gwangju city in connection with a previously identified Buddhist temple cluster.

A surge in cases in South Jeolla province, which surrounds Gwangju, led the provincial government to tighten social distancing measures. Under the “Social Distancing Level 2”, gatherings of 50 or more people indoors or 100 or more people outdoors are banned, and wearing masks is mandatory when using public transportation.

Of the total cases reported in the past week, infection routes for 10.7 per cent of the cases remain unidentified, Jeong said, adding that “quiet transmission” among those in their 50s or over is taking place in the community.



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