No new people tested positive for COVID-19 today.
This is the first time South Australia has not recorded a new positive case since March 10, 2019.
The total number of cases in South Australia remains 429. To date, 239 people have been released from COVID-19.
There have been four deaths reported in South Australia from COVID-19.
Six people aged between 52 and 77 are currently in intensive care at Royal Adelaide Hospital, two of whom are in critical condition and four are stable.
Investigations are ongoing into the cluster of cases identified at Adelaide Airport, which is connected with 34 people. Further investigation has found cases in other types of airport workers.
About 750 Qantas staff who have started work on Wednesday 18 March, in three special staff areas at Adelaide Airport, are now being asked to carry out isolation at home immediately.
At this stage, no public areas are believed to have been affected, however, anyone who is ill with COVID-19 symptoms and has been at Adelaide Airport, including in a terminal or parking lot, must be present for testing.
If Qantas staff have a problem, they should contact the Health Control Infectious Disease Control (SA) Branch of SA on 1300 232 272 272.
There are two separate groups connected with 40 people who are still being investigated in the Barossa Valley, and travel in or out of Barossa must still be limited. Anyone who has been in Barossa since Saturday 14 March 2020 who has experienced symptoms must immediately isolate themselves and be tested.
There are 89 cases in SA related to the cruise ship Ruby Princess, which is the largest group in the case.
SA Pathology has conducted more than 36,000 tests for COVID-19 so far.