"Initially, the programme will be offered to high school students in the highest risk areas progressively over the two weeks from September 26," Dr Mills said.
"With exams coming up it's important to get that group vaccinated before the exam season starts."
The first schools involved are Kamo High, Bream Bay College, Whangarei Boys' and Girls' High, Whangaroa College, Kerikeri High, Springbank, Northland College, Te Kura Kaupapa O Kaikohe, Okaihau College, Bay of Islands College, Taipa Area School, and Kaikohe Christian School.
Dr Mills said there are usually between 0-2 cases of type C per year in Northland, while in previous years meningococcal type B disease was the most common type in the region.
"The current situation is, therefore, consistent with a community outbreak. Following expert advice and in consultation with the Ministry of Health we have decided to launch a vaccination campaign to help control this outbreak and prevent more cases of disease," she said.
The DHB hoped to vaccinate about 35,000 of those in the 1-20 age group before December 16 and was optimistic it would reach this target. Dr Mills said the disease was serious and had major health implications and she did not think there would be widespread opposition to the vaccination campaign.
The DHB would not say how much the vaccination campaign would cost, or who was paying for it - the DHB or the Ministry of Health - with discussions between the two organisations over that issue ongoing.
Those outside the targeted age group could buy type C vaccinations from their doctor, but the immunisation campaign is likely to take up most of the country's available stock. Once new stock arrives from October 6 the campaign is expected to be offered to primary schools from the beginning of November.
"Vaccination offered through a school-based programme is the most effective way of ensuring that as many students as possible are protected against the disease," Dr Mills said.
The vaccination campaign will be launched with extensive media advertising, public relations, a poster campaign and widespread communication with schools, parents and caregivers, students, and health professionals in Northland.