China said on Monday that just three people have died from Covid-19 in Shanghai since a gruelling lockdown began last month, despite recording hundreds of thousands of cases of the fast-spreading Omicron variant in the eastern megacity. Authorities said the first deaths from China’s biggest outbreak since the virus wave in Wuhan over two years ago were three people aged 89 to 91, all of whom had underlying health issues and had not received Covid vaccines. Beijing insists that its zero-Covid policy of hard lockdowns, mass testing and lengthy quarantines has averted fatalities and the public he…