Now the South Australian Government has moved to close its borders.
The border closure will mirror the Northern Territory move to shut its borders at the same time, 4pm on Tuesday.
Premier Steven Marshall said the measures, which would be in place from 4pm on Tuesday, were being taken in the "interest of ... public health".
He said the Government would establish 12 border crossings where travellers will be required to sign a declaration about their health and ability to undertake mandatory self-isolation for two weeks.
Mr Marshall said people in border communities would still be allowed to cross into South Australia as long as there were no coronavirus outbreaks in those towns.
The Premier said health advice was to reduce the number of people coming across the borders for holidays.
The measures will have exemptions allowing freight to cross the border, the same as the Territory.
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