From Saturday free chickenpox vaccines will be available to 15-month-olds and 11-year-olds who have not had the disease.
In June last year Pharmac confirmed it would extend funding for a chickenpox vaccine to all children from July 1, 2017. The varicella (chickenpox) vaccine would be part of the immunisation schedule - until now it had only been funded for children with certain risk factors.
One dose of the vaccine will be available for free to children turning 15 months of age on or after July 1.
This will protect most immunised children from chickenpox and the few who do still catch the disease, despite being immunised, will be protected from its most severe effects.
Although most caught the disease as children, those who got it as adults were at much higher risk of serious illness so, from July 1, children turning 11 who have neither had chickenpox or been immunised against it will also be eligible for a free dose of the vaccine.
Health Minister Dr Jonathan Coleman said funding the vaccine would help to significantly reduce the harm caused by chickenpox.