South Korea's 5 Omicron Cases All Connected to Travel to Nigeria

South Korea confirmed Wednesday that five cases of Omicron were connected to people traveling from Nigeria last week.

The Associated Press reported that two of the cases involving the new variant are linked to women who went to Nigeria and flew back to South Korea on November 23.

The three remaining cases are connected to a couple who traveled from Nigeria to South Korea on November 24, and their friend who picked them up from an airport and drove them home.

The couple was fully vaccinated, but the friend who picked them up and their teenage child were not vaccinated, said Choi Seung-ho, an official with the Korea Disease Control and Prevention Agency (KDCA).

Health care workers said they're running a genetic sequencing test on the teenager and the relatives of the friend who drove the couple home to see if anyone has been infected with the new variant.

So far the four individuals have not experienced any severe symptoms. They're reported mild respiratory symptoms and muscle pain, said Park Young-joon, another KDCA official.

With the arrival of the new Omicron variant, South Korea announced new travel restrictions to go into effect for at least two weeks for all passengers. Everyone arriving from out of the country, regardless of their vaccination or citizenship status, must quarantine for at least 10 days.

For more reporting from the Associated Press, see below.

Incheon International Airport, South Korea, Covid-19
A staff member (C) wearing protective equipment guides a traveler at the arrival hall of Incheon International Airport on November 30, 2021, amid growing concerns about the Omicron variant. Jung Yeon-je / AFP/Getty Images

The country had already banned short-term foreign travelers arriving from eight southern African nations, including South Africa, starting Sunday to fend off Omicron, which is seen as potentially more infectious than other versions of the virus. Officials say the same rules will now be extended to foreigners coming from Nigeria.

While Omicron's emergence has triggered global alarm and forced countries to tighten their borders, scientists say it's not yet clear whether the variant is more contagious or dangerous than other strains, including the devastating Delta.

The detection of South Korea's first Omicron cases came as a Delta-driven surge leaves the nation grappling with its worst wave of the virus since the start of the pandemic. Wednesday also saw the country's new daily cases exceed 5,000 for the first time, and the spike in transmissions is pushing hospitalizations and deaths to record highs.

Amid growing fears about overwhelmed hospitals, health experts have urged officials to reimpose stricter social distancing rules that were eased last month to soften the pandemic's impact on the economy.

KDCA said most of the new 5,123 cases came from the capital, Seoul, and the surrounding metropolitan region, where officials say nearly 90 percent of intensive care units designated for COVID-19 patients are already occupied.

More than 720 virus patients were in serious or critical condition, also a new high. The country's fatalities reached 3,658 after numbering between 30 and 50 a day in recent weeks.

The government eased social distancing rules at the start of November and fully reopened schools starting Nov. 22 in what officials described as the first steps toward restoring some pre-pandemic normalcy. In allowing larger social gatherings and longer indoor dining hours, officials had hoped that the country's improving vaccination rates would help keep hospitalizations and deaths down even if the virus continues to spread.

However, health workers are now wrestling with a rise in serious cases and deaths among people in their 60s and older who had either rejected vaccines or whose immunities have waned after being inoculated early in the immunization campaign that began in February.

The spread has prevented the government from taking further steps to ease social distancing, but officials have so far resisted calls to restore stricter gathering rules, citing economic concerns and people's fatigue and frustration over extended virus restrictions.

"We cannot retreat to the past by reversing our efforts to gradually restore normal life," President Moon Jae-in said during a virus meeting Monday.

Instead, officials are scrambling to speed up the administration of booster shots and are managing the sharing of hospital capacities between the greater Seoul area and other regions with smaller outbreaks to prevent hospital systems from being overwhelmed. Officials also said they will revamp medical responses so that most mild cases will be treated from home.

Son Youngrae, a senior Health Ministry official, said nearly 12,000 virus carriers were being treated from home as of Wednesday morning.

The Korean Federation of Medical Activist Groups for Health Rights, which represents doctors and health workers, issued a statement criticizing the government for putting lives at risk with its "ill-prepared" policies to restore normalcy. It said the government should restore stricter social distancing rules and procure more beds from private hospitals for COVID-19 treatment.

"While the government says it will focus on raising vaccination rates, that cannot be an immediate solution to the current crisis as it would take time for improved vaccination rates to take effect," the group said. "Saying that home treatment will be standard (for mild cases) is just a way of rationalizing the current situation where a shortage in hospital beds has forced many virus patients to wait at home. It's basically a declaration to give up treatment."

Covid-19,  International Airport In Incheon, South Korea
Quarantine officers wait to guide travelers at the arrival hall of the Incheon International Airport In Incheon, South Korea, Wednesday, Dec. 1, 2021. South Korea's daily jump in coronavirus infections exceeded 5,000 for the first time since the start of the pandemic, as a delta-driven surge also pushed hospitalizations and deaths to record highs. Ahn Young-joon/AP Photo