The number of Australian people who have died after contracting COVID-19 has now reached 16, following the death of two more people overnight.
A man aged in his 80s died of coronavirus in hospital, taking Victoria's death toll to four.
There have been 84 new cases confirmed overnight, bringing Victoria's total to 769. Most cases are in metropolitan Melbourne.
The cases include 419 men and 346 women, aged from three to 88.
There are 21 confirmed cases of COVID-19 in Victoria that may be through community transmission, the health department said.
More than 39,000 Victorians have been tested and 193 people in the state have recovered from coronavirus.
"If you can stay at home, you must stay at home. This is the only way we are going to defeat COVID-19. It is the only way we are going to slow down the spread," Victorian Health Minister Jenny Mikakos said.
Cruise ship passenger dies of COVID-19
In Queensland, a 75-year-old woman who had been a passenger on the Ruby Princess cruise ship that docked in Sydney has died, taking the state's toll to two.
The woman, who died in a Caboolture Hospital, was a passenger on the Ruby Princess cruise ship, says Queensland Chief Medical Officer Jeannette Young.
It comes as the government announced Brisbane's showgrounds could be used as an emergency hospital if the COVID-19 outbreak reaches the severe stage in Queensland.
Premier Annastacia Palaszczuk says the facilities at the Royal Queensland Show property followed by Brisbane's convention centre in South Bank would be used in a "worst case scenario".
A total of 31 COVID-19 cases have been confirmed in Queensland overnight, bringing the state's total to 656.
Three people are in intensive care.
Mandatory quarantine enforced
A total of 77 travellers into Brisbane were placed in mandatory quarantine on Sunday morning, following measures that came into effect at midnight on Saturday.
The passengers will be held in the Novotel and Ibis hotels near Brisbane airport but other hotels are available if there is demand, Dr Young says.
All passengers arriving on international flights who are returning home or passing through will be held in the hotels for 14 days.
New Zealand has recorded its first death from the virus.
Australians must stay at least 1.5 metres away from other people. Indoors, there must be a density of no more than one person per four square metres of floor space.
If you believe you may have contracted the virus, call your doctor (don’t visit) or contact the national Coronavirus Health Information Hotline on 1800 020 080.
If you are struggling to breathe or experiencing a medical emergency, call 000.
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