The government has requested anyone who has been in South Australia since Monday, November 9 to immediately self-isolate at their home or in their accommodation.
It has asked anyone who has been in South Australia recently to be mindful of COVID-19 symptoms and seek testing even if the symptoms are mild.
These directions come as Adelaide deals with a recent outbreak of 17 COVID-19 cases.
Premier Peter Gutwein said anyone from South Australia will be required to quarantine for 14 days on arrival to Tasmania from today.
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This can happen at either a residence or a hotel.
Mr Gutwein said at this stage, South Australia would not be elevated to a medium-risk jurisdiction on par with Victoria.
He said the government would provide a further update on the developing situation this afternoon.
A direct flight will arrive in Tasmania from Adelaide today.
Mr Gutwein said 900 people have arrived to Tasmania from South Australia in the last week.