South Korea on Thursday reported fewer than 200 new Covid-19 cases for the first time in more than two weeks but authorities remain on high alert after the number of seriously ill patients increased and a new cluster of infections was identified in a kimchi factory.The country reported 195 new cases, including 188 local infections, increasing its total caseload to 20,644, the Korea Centres for Disease Control and Prevention said. However, the number of patients in serious or critical condition…