https://en.yna.co.kr/view/AEN20200220002055320

SEOUL, Feb. 20 (Yonhap) -- South Korea reported its first death from the new coronavirus on Thursday, with 53 new cases of the coronavirus confirmed in a single day to bring the total here to 104.

Most new cases occurred in the southeastern city of Daegu. The city's mayor urged its 2.5 million people to refrain from going outside to stem the spread of the virus.

This week's surge in the number of infected people, increasing the nation's total infections by more than 70, came as the health authorities warned that the virus has begun spreading locally.

Vice Health and Welfare Minister Kim Kang-lip told reporters that, "At this stage, (the government) judged that COVID-19 is spreading locally with a limited scope."

The health authorities have been adjusting its quarantine and prevention work to cope with local transmission, Kim said. They will deploy 24 more doctors to Daegu and expand the number of virus-detection centers to 22 in the city.

Still, the authorities kept the virus alert level at "orange," the third highest, Kim said.

Apparently, ~40 or so of the 104 infections were due to a superspreader:

https://www.livescience.com/coronavirus-superspreader-south-korea-church.html

One women who went to church managed to infect almost 40 people that are known about.