About one-third of swine flu patients admitted to NZ and Australian intensive care units had no underlying health problems, a study has found.

A St John investigation has found insufficient training of call staff in its swine flu pandemic protocols was a key factor in ambulance response delays.

A New Zealand man who died from swine flu (H1N1) complications in Canada this week developed the disease before arriving.

A nurse who worked at Hutt Hospital has become the first frontline health worker in NZ to die after contracting the swine flu virus.