Northland has the poorest infant immunisation rate in the country and nearly 80 diseases that could be prevented by vaccination showed up in the region.
A local paediatrician is laying the responsibility at the feet of parents and caregivers as well as demanding better performance from the health providers responsible for immunisations.
The Northland DHB failed to meet the Ministry of Health's target for increased immunisations in the January to March quarter. Data showed 87 per cent of eight-month-olds had their primary course of immunisation at six weeks, three months and five months on time. The target was 95 per cent.
Northland District Health Board paediatrician Roger Tuck said immunisation was a key factor in the health and well-being of children.
"Children are entitled to be vaccinated and parents who are not immunising their children need to know that they are actively making a decision not to protect them," Dr Tuck said.