Australia’s Queensland state on Wednesday said it would close its border with New South Wales state to hold back a second wave of COVID-19, while the country’s second-largest city Melbourne was set to shut most businesses from midnight.A surge in coronavirus cases in Melbourne has forced the state of Victoria to impose a night curfew, tighten restrictions on people’s movements and order most businesses to stop trading from Wednesday night.Other states are imposing new restrictions of their own to prevent any spillover form Victoria and an even bigger hit to the national economy, which has plunged into its first recession in nearly three decades. ‘No dancing, no singing’: Australia coronavirus measures increase as surge spreads Australia.