ANTIGEN TEST. A medical worker calls the name of a visitor waiting to take a rapid antigen test for Covid-19 at a clinic in Seoul on March 18, 2022. South Korea's new Covid-19 cases hit above 400,000, led by the wave of the highly transmissible omicron variant, amid the government's steps to shift away from rigorous social distancing.(Yonhap) SEOUL - South Korea's new coronavirus disease 2019 (Covid-19) cases fell below 400,000 on Saturday but concerns linger over the highly transmissible omicron variant amid the government's move to shift away from rigorous social distancing. The country reported 381,454 new Covid-19 infections, including 63 from overseas, raising the total caseload to 9,038,938, the Korea Disease Control and Prevention Agency (KDCA) said. The latest tally is a sharp drop from the all-time high of 621,328 on Thursday, though the sudden spike in cases reflected some 70,000 cases omitted from the previous day's tally. The fast spread of omicron has p