South Australian Premier Steven Marshall has declared the entire state a hotspot, and announced the border will close.
Anyone who has been in Terminal 4 of Melbourne Airport since February must quarantine for 14 days from the date of arrival. Family or household contacts must also quarantine until at least the first negative result has been received.
Further, anyone who has been at Tullamarine Airport, including staff, from February 7, need to test and isolate until they get a negative result.
South Australia has not recorded any new cases of COVID-19 in the past 24 hour reporting period.
