The south Korean central headquarters for crisis control said that cases with their causes and inroads of infection uncertain appeared in Seoul, Taegu and other some areas, noting that COVID-19 spreads to different areas beyond restricted extent.

Meanwhile, south Korean experts at infectious diseases said at a press conference on Thursday that it is highly like that infection will spread before medical checkup of asymptomatic or relatively mild cases, noting that the novel coronavirus is estimated to be high in discharge at its early stages.