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CALGARY They spread faster, can hit harder and now COVID-19 variants are the dominant strains of new cases in Alberta. Three mutated variants, originating in the U.K., Brazil and South Africa, are game-changers in the fight against the virus which will likely surge cases higher than Alberta has seen yet. “It is now that we have to act. If we wait to act until our ICUs are overflowing, it will be far too late,” said Dr. Deena Hinshaw, Alberta’s chief medical officer of health during her daily update Thursday. It s also changed Alberta’s testing. “Testing all close contacts twice we have a better chance at quickly identifying new cases and stopping their spread,” said Hinshaw.