Also Read | Inside the Mindtree makeover strategyThe new outbreak in Melbourne, where the Australia Open tennis tournament is underway, has stirred fears of a fresh wave of infections in the state hardest hit by COVID-19.Victoria had more than 20,000 cases last year and over 800 deaths, forcing authorities to implement a strict lockdown lasting more than 100 days, the most severe action taken by any Australian state.The latest outbreak, which was likely sparked by a medical device known as a nebuliser being used by a COVID-positive guest at the hotel, consists of three hotel workers and two returned travellers in quarantine.The remaining guests have been transferred to another hotel to serve out their quarantine and more than 100 hotel.