The extent of Victoria's catastrophic hotel quarantine scheme has been revealed, after it was confirmed returned travellers accounted for more than 99 per cent of the state's COVID-19 cases. An inquiry into the bungled hotel quarantine program in Melbourne also heard security guards did not receive adequate training and there was no proper chain of command in place. The Doherty Institute’s Ben Howden said “these transmission networks could be collapsed into a single cluster for reporting purposes”. “Subsequent clusters are derived from the original cluster,” he said. The inquiry also confirmed government ministers would be called to give evidence. Victoria recorded 282 new cases yesterday and 25 new deaths, making it the state’s deadliest day since the beginning of the pandemic.