Overview:On the 19th of March 2020, thousands of passengers disembarked from the Ruby Princess cruise ship in Sydney harbour. Their “luxury” cruise holiday had been cut short after authorities announced cruise ships would be banned from Australian ports as part of measures to stop the spread of coronavirus. Passengers mingled in groups on the shore before dispersing around the country and overseas. Far from protecting people, the release of the Ruby Princess’s passengers instead triggered a public health emergency with the cruise ship now named as the single largest source of Australia’s coronavirus infections.