A nurse at Waitematā DHB where three staff have contracted Covid-19 says "beggars belief" that personal protective equipment use failed.
But she says her DHB is ill-prepared and has shown inconsistent communication, and the situation does not surprise her.
The three hospital workers in Auckland who cared for people infected with Covid-19 from St Margaret's Hospital and Rest Home have tested positive for the disease.
The third coronavirus case was confirmed on Friday - one was included in Thursday's cases and a third last weekend.
The DHB said it does not know for sure the source of the infection. But a nurse who spoke to RNZ's Phil Pennington on condition of anonymity says Waitematā's use of PPE is particularly poor.