COVID-19 pandemic in South Korea
The first case of COVID-19 in South Korea was announced on 20 January 2020. The number of confirmed cases increased on 19 February by 20, and on 20 February by 58 or 70, giving a total of 346 confirmed cases on 21 February 2020, according to the Korea Disease Control and Prevention Agency (KDCA), with the sudden jump mostly attributed to "Patient 31" who participated in a gathering at a Shincheonji Church of Jesus the Temple of the Tabernacle of the Testimony church in Daegu.
Source: Wikipedia — COVID-19 pandemic in South Korea (CC BY-SA 4.0)