Canada warns of fourth wave of coronavirus by end of summer

People line up to dine at a restaurant that has painted its walls to support the frontline workers in Toronto, Canada (Kamran Jebreili/AP)

Canada’s chief public health officer said that the country could face a fourth wave of Covid-19, driven by the Delta variant, by the end of summer if restrictions are eased too quickly and before enough people have been vaccinated.

Dr Theresa Tam said robust vaccination rates have helped reduced hospital admissions and deaths but inoculations must rise further to avoid renewed strain on hospitals and the health-care system.