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A possible variant case of COVID-19 forces the closure of an entire school in Quebec City
COVID-19 variant.Regional Public Health Director Dr. André Dontigny said the case was flagged through preliminary laboratory screening, which can detect mutations that are present in three highly-transmissible variants of the virus.But Dontigny, speaking at a rare Saturday news conference, told reporters that officials had not yet confirmed the presence of a variant, let alone whether the case in question is linked to any of the three variants of concern that have surfaced so far in Canada.