Pharmac confirmed last week that it had procured an additional 5000 doses of meningococcal ACWY vaccine, taking the total stock available for Northland's targeted three-week vaccination programme to 25,650 doses.
The vaccination programme began last week in response to what the Northland DHB described as a community outbreak of the W strain of the bacterium that causes meningococcal disease (Men W).
Northland residents aged from 9 months to under 5 years, and from 13 to under 20 years, are eligible for the free vaccination.
"Our aim is to build our population's immunity, and we can achieve this by ensuring that all of the eligible children are offered the vaccine over the next three weeks," said Jeanette Wedding, the DHB's general manager, Child, Youth, Maternal, Oral, Public Health Services and District Hospitals.
The groups that were eligible for free vaccinations had been targeted because children under 5 were generally most affected by meningococcal disease.
The vaccine could not be given to babies under 9 months.