Parents who vaccinate their children against meningitis can't be complacent because it doesn't protect against all strains of the virus, says Wellington's medical officer of health.
Wellington schoolgirl Amanda Crook-Barker died earlier this week within hours of showing meningococcal symptoms.
The 12-year-old is the third fatal meningococcal case this year.
Since then there has been a rush to immunise against the illness.
But Dr Annette Nesdale said people must continue to be vigilant because the vaccine did not protect against all strains of the illness.