A health official says it is unlikely anyone who came into contact with a tuberculosis patient who died at Auckland Hospital will develop the disease.
The Auckland District Health Board says a diagnosis was not made until after the woman's death several weeks ago.
The DHB is identifying and testing more than 240 hospital staff and students and up to 20 patients who were in contact with her.
Auckland regional medical officer Dr Greg Simmons told Morning Report that no new cases of infection have been found.
He said he's confident everyone who was in contact with the woman will be identified and says it is very unlikely any will develop active TB.
Dr Simmons expects the investigation will take several months.
The DHB says the TB was a rare form of the disease and the usual signs were not present when the woman was treated.