Confirmed measles cases in Auckland have now reached 778.
Auckland Regional Public Health Service, medical officer of health, Dr William Rainger confirmed on Saturday 19 new cases over the past 24 hours.
Children under the age of 5, and those aged between 15-29, were most affected. Forty per cent of people who had contracted the illness had needed hospital treatment.
"Some of these people have been very very unwell," Rainger said.
He said the priorities for health officials were to limit measles' spread in Auckland, protect the most vulnerable, increase the uptake of vaccinations and also limit the spread across the country.