China reported 3,393 new Covid-19 cases Sunday, the National Health Commission said, more than double the previous day, as the country faces its gravest virus outbreak in two years. A nationwide surge in cases has seen authorities close schools in Shanghai and lock down several northeastern cities, as almost 19 provinces battle local outbreaks of the Omicron and Delta variants. The city of Jilin has been partially locked down, with hundreds of neighbourhoods sealed up, […]