Waitakere Hospital staff have tested positive for Covid-19.
The three staff were working on a ward with patients who had been transferred from the CHT St Margaret's residential aged care home in Te Atatu.
Three of those residents died after being sent to the hospital. Now, Waitematā DHB has confirmed its own staff have caught coronavirus.
Waitakere Hospital has closed affected wards to further admissions and will undertake contact tracing to try to establish the source of the infections.