* South Australia has reimposed a range of renewed COVID-19 restrictions as officials battle to contain a rapidly spreading and worrying cluster of infections in the state's "biggest test to date".
* Premier Steven Marshall says restrictions on pubs and restaurants, gyms, and limits on various gatherings will come into effect from midnight and remain for at least two weeks.
* He said the situation was dangerous and time was of the essence in dealing with the outbreak which currently stands at 17 cases.
* The cluster has been linked to one of Adelaide's quarantine hotels with three staff, including two security guards, among those testing positive.
* Acting Chief Medical Officer Paul Kelly is confident South Australia can get on top of the SA cluster which has compelled other states and territories to close their borders to SA.
* Queensland, Western Australia, the Northern Territory and Tasmania announced broad travel restrictions on arrivals from Adelaide on Monday.
* Canberra residents are being asked to reconsider all non-urgent travel to SA, while Victoria has imposed extra screening for SA arrivals at Melbourne airport.
* NSW has opted to go it alone and stick to its open border policy with SA, as it recorded two new cases among overseas travellers in hotel quarantine.
* Prime Minister Scott Morrison, who has been working with the premiers on the economy and community activities reopening by Christmas, said the immediate response from the other states and territories to reimpose restrictions would be "temporary".
* The prime minister visited Melbourne on Monday for the first time since February as the federal government announced a new, hi-tech vaccine manufacturing facility as part of a $1.8 billion deal.
* New Zealand Prime Minister Jacinda Ardern conceded there's very little chance of an operational trans-Tasman travel bubble by Christmas amid the SA outbreak.
* WA only had one new case - a returned overseas traveller in hotel quarantine.
* The Australian Medical Association has called for Victoria's health department to be "less defensive" and more transparent about its handling of the pandemic, as a parliamentary inquiry into the state's contact tracing system began on Monday.
* Victoria's death toll stands at 819, with the national figure 907.
* Test skipper Tim Paine and young gun Cameron Green are among the cricketers forced to self isolate as a fresh coronavirus outbreak in Adelaide cast a shadow on the first Test.
* Victorian Premier Daniel Andrews cast fresh doubt over the Australian Open, saying plans for the state to host the entire summer of tennis are "far from a done deal".
AUSTRALIAN CORONAVIRUS NUMBERS
* There were 21 new cases recorded in Australia - 18 in SA, two in NSW and one in WA.
* The national death toll is 907: Victoria 819, NSW 55, Tasmania 13, WA 9, Queensland 6, SA 4, ACT 3. (Two Queensland residents who died in NSW have been included in the official tolls of both states).
GLOBAL CORONAVIRUS NUMBERS
* Cases: at least 54,370,000
* Deaths: at least 1,317,000
* Recovered: at least 34,965,000
Data current as of 1830 AEDT November 16, taking in federal and state/territory government updates, Worldometer and Johns Hopkins Coronavirus Resource Centre.