A new vaccine storage facility delivering to 13 countries across the region has opened in Fiji.
Previously, vaccines were kept in a cold room alongside imported frozen produce.
The facility, provided by the New Zealand government, means that UNICEF will now be able to host new vaccines such as Hepatitis and HPV which require specific storage requirements.
UNICEF's deputy representative Isabelle Austin says the facility is a breakthrough for the region.
This is for us, and for the children of the Pacific, something extremely important. It's perhaps, not fully known but the coverage of basic immunisation programmes in the Pacific is not as good as it would be expected. Actually, in some countries, coverage of even the basic antigens are as low as in some countries in Africa.