A man walks pass a sign for flu shots in Toronto on January 9, 2018. Doctors are anticipating that the collision of COVID-19 and cold and flu season could bring a new host of health-care challenges when the cold weather sets in. Dr. Sandy Buchman, president of the Canadian Medical Association, said the convergence of seasonal infections and a potential second wave of the novel coronavirus could have ripple effects across the medical system and beyond. THE CANADIAN PRESS/Doug Ives