Five people in Tasmania have tested positive for coronavirus today, bringing the number of confirmed cases within the state's boundary to 15.

In a statement issued on Saturday, Tasmanian director of public health Mark Veitch wrote that three of the people who had been confirmed to have contracted COVID-19 on Saturday had been passengers on the Ruby Princess Cruise, while the other two had recently returned from Europe.

The Ruby Princess cruise ship docked in Sydney in Thursday and 2700 passengers disembarked. Two confirmed cases in Northern Territory had also been on the vessel.

The total number of confirmed coronavirus nationwide passed 1000 today, with 83 new cases recorded in New South Wales, 51 in Victoria, 37 in Queensland, 26 in Western Australia and 17 in Adelaide.