Australian Prime Minister Anthony Albanese said he had tested positive for COVID-19 on Monday afternoon and would work from home in isolation.
In October, Australia ended mandatory home quarantine for COVID-infected people.
"I encourage anyone who is unwell to test and to take any extra precautions to keep their families and neighbours well," Albanese said in a statement.
Albanese is due to make a two-day trip to Papua New Guinea on December 12-13.
It is the second COVID infection for Albanese, who was sidelined for some of the federal election campaign earlier this year after a positive test.
Albanese's Labor Party won power at the election.
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