COVID-19 variants raising new concerns among infectious-disease experts and health officials
New variants of COVID-19 are taking hold across the world, leading to rapid rises in cases from mutations that make the virus more contagious, or harder to fight off. New variants of COVID-19 are taking hold across the world, leading to rapid rises in cases from mutations that make the virus more contagious, or harder to fight off. In the past month, the variants have caused Toronto officials to beg for longer lockdowns, a rethink in Europe around schools and mask usage and an entire election disrupted in Newfoundland and Labrador. On Friday, Manitoba reported three new cases of the U.K...