A patient at Middlemore Hospital has tested positive for Covid-19 after spending the night in care there.

The Ministry of Health says the person arrived on Saturday evening with abdominal pain, and was tested for the virus after receiving a CT scan.

The patient was asymptomatic for Covid-19.

Staff have begun the process of identifying the patient's movements since arriving at the hospital, and a number of staff who may have been exposed are being asked to self-isolate.

Later today, the government will announce whether there will be a change in alert levels outside Auckland.

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