"The current situation is, therefore, consistent with a community outbreak," said Northland medical officer of health Dr Clair Mills. "... we have decided to launch a vaccination campaign to help control this outbreak and prevent more cases of disease.
"As meningococcal disease tends to have a seasonal pattern, we may see a decline in cases of disease as we move further into spring. This is not certain, however, and we don't wish to wait and see."
Northland has around 44,000 people aged more than 12 months and less than 20. The Northland District Health Board aims to vaccinate 38,000 - 85 per cent - of them in a campaign between Monday and December 16. The single-injection vaccine will be offered to school pupils at school, to pre-schoolers at GP clinics, and to those who have left school at GP and special clinics.
The ministry's director of public health, Dr Darren Hughes, said Northland was the only region experiencing a higher-than-usual rate of C-strain meningococcal infection this year.
He warned that even if people received the C-strain vaccine, warning signs of the disease should still be watched for, because the vaccine did not work in some, and it did not protect against other strains of the bacteria.
Meningococcal disease can be treated with antibiotics if detected early. Symptoms include high fever, headache, vomiting, stiff neck, aches and a rash.
Urgent medical care should be sought if meningococcal disease is suspected, or call Healthline on 0800 611 116.
The vaccine
* Meningitec
* Single dose typically provides at least five years' protection against meningococcal C infection.
* Effective in 90-95 per cent of recipients.
* Protective after 10 days.
Source: Northland District Health Board