A third person has returned an initial positive result for deadly coronavirus in Adelaide, but SA Health says there is no need for concern.

The health authority has revealed one person had initially returned a ‘weak positive’ result but was cleared of any known link to coronavirus through subsequent tests on Tuesday afternoon.

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Two people were found to have the virus on Saturday 1 February.

An additional 25 South Australians are currently awaiting test results.

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SA Health says patients should continue to present to their GP if they are displaying any symptoms and have recently returned from mainland China, or have been in close contact with someone who is a confirmed case.

Importantly, patients should call ahead first so their GP can prepare for their visit.