Nearly 500 more people have tested positive for coronavirus after a Covid testing bungle affected almost 1000 people at one of Sydney's major hospitals.
SydPath said on Monday 995 people had been prematurely sent negative test results from St Vincent's Hospital before the result had been determined.
On Tuesday, SydPath clarified 486 of the 995 have been confirmed as positive coronavirus cases.
"Once again, we are sincerely sorry for this error and acknowledge the significant impact it has had on those involved," SydPath said in a statement.
"In order to contend with the major increase in volume of tests, SydPath had recently moved from an automated system to a manual system to expedite the release of negative test results.
"Unfortunately during this manual process a simple data processing error was made which led to the wrong test results being released. We have reverted to our automated systems to ensure this type of error cannot happen again."
St Vincent's Hospital on Sunday said it had also incorrectly sent text messages to 400 people telling them they had tested negative for Covid-19. It was through investigating this error the hospital determined 995 people had prematurely been sent the wrong message.
The clinic is now asking only people who have Covid-19 symptoms, those living with a confirmed case or those who have been in a high-risk environment for coronavirus transmission visit St Vincent's Hospital for testing.
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