TORONTO—Ontario detected Canada’s first two known cases of Omicron on Nov. 28, a new COVID−19 variant of concern that has led to a slate of fresh border restrictions around the world. Both cases of the variant were found in the Ottawa area in people who had recently been in Nigeria, Ontario Health Minister Christine Elliott said in a joint statement with the province’s top public health official, Dr. Kieran Moore. “Ontario is prepared and ready to respond to this new variant. Our hospital and intensive care capacity remain stable and the province continues to report one of the lowest rates of active cases in the country,” the pair said. They said Ottawa Public Health is conducting “case and contact management” and the patients are self−isolating, while the province is testing all eligible positive COVID−19 samples to determine their variant. The federal government recently banned visitors from seven countries in southern …