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Along with this, confirmed patients with unknown infection routes came out from academies in Gangnam, Seoul, and companies in Yeouido. In this way, the metropolitan area is a place where half of the population of the Republic of Korea lives and is frequented by people, so there may be more cases where it is not possible to know where the infection has been, so the authorities are more tense.

Reporter Jeong Seong-jin covered this content.

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total of 7 confirmed cases came from an IT academy in Gangnam, Seoul.

On the 12th, after the first confirmation of a counseling instructor in his 30s, an investigation was conducted on about 30 people, including employees in the same office, and two of them were confirmed.

Three families, including the parents of an instructor in their 30s, and one academy student in their 20s were also infected.

However, the initial path of infection of the instructor in her 30s has not been identified, and there is no record of contact between the instructor and the student in her 20s.

[Gangnam IT Academy officials: (diagnosed with) students is the fact that I got upside contact (dwaetdago confirmed) Now the first diagnosis, and without even copper wire are overlapped, Testing Pool is also not eotneunde at the health center]

small software company located in Yeouido, a large office building Also, the first confirmed case occurred on the 14th, and the path of infection for this patient is also unknown.

Eventually, 6 people were added, including 5 co-workers, and the number of confirmed cases increased to 7.

Of the 1,126 new patients in the last two weeks, 131 or 12% of the so-called'blinking' patients whose infection route has not been confirmed.

[Jung Eun-kyung/Director of Disease Control: This is the situation that the quarantine authorities were most concerned about. Since the propagation speed is so fast and once exposed, everyone is not immune, so if it leads to 2nd, 3rd, and nth propagation, it's like a dam collapse... .] In an

emergency for the spread of regional infection, SK Telecom, KT, and Kakao switched to telecommuting again, and Naver returned to a rotational work system.

(Video coverage: Park Hyeon-cheol, video editing: Park player)