State and territories have continued to tighten their borders as more coronavirus cases emerge in NSW and Victoria.
US coronavirus cases have crossed the 20 million mark as officials seek to speed up vaccinations and a more infectious variant surfaces in Colorado, California and Florida.
Anyone travelling to the ACT from a COVID-19 hotspot in NSW will now require an exemption.
One word has been changed in Australia's national anthem to reflect what the prime minister calls "the spirit of unity".
The empty yacht of an experienced sailor who is missing in Bass Strait has been towed to shallow waters for examination by police.
Victoria will start 2021 by closing its border with NSW as it battles a fresh coronavirus outbreak.
South Australia will impose a hard border closure with NSW in response to the spread of COVID-19 cases in Sydney, with officials also keeping their "fingers and toes crossed" in relation to Victoria as cases emerge in Melbourne.
Britain has become the first country to approve a coronavirus vaccine developed by Oxford University and AstraZeneca, hoping rapid action will help it stem a surge of infections driven by a highly contagious variant of the virus.
New Year's Eve restrictions across greater Sydney have been tightened after NSW reported 18 cases of community transmission of coronavirus and a second cluster in the city's inner west.
NSW is not out of the woods in its suppression of a COVID-19 outbreak, Premier Gladys Berejiklian warns, with three new cases diagnosed without immediate links to the northern beaches cluster.