South Korea on Tuesday ordered schools and kindergartens in Seoul to resume online classes as authorities struggle to contain several coronavirus clusters.There were 280 new infections confirmed on Tuesday, taking South Korea’s total to 17,945. The numbers are low in global terms but represent the country’s 12th consecutive day of triple-digit increases after several weeks with new cases in the 30s and 40s.“It is as if we were standing in front of a storm barrelling down on us,” said Kwon Joon…