Residents queue for a Covid-19 vaccination outside a pharmacy in western Sydney. Photo: AFP With the city of 5 million people ordered to stay home amid an outbreak of the highly transmissable Delta variant, authorities outlined even tighter restrictions for the worst affected suburbs, including mandatory testing and mask-wearing outdoors. From Monday, some 300 Australian army personnel will help police door-knock people who have tested positive to the virus to ensure they are isolating, New South Wales police commissioner Mick Fuller said at a televised news conference. "The sheer volume of increase over the last week [means] the level of compliance [enforcement] has gone from hundreds into thousands," he said.