Two UN agencies have called for a catch-up in child immunisation, warning global vaccinations of children stalled last year, leaving 2.7 million unvaccinated or with insufficient inoculations.

The latest World Health Organization (WHO) and the UN Children's Fund (UNICEF) estimates of national immunisation coverage provide the world's largest and most comprehensive dataset on immunisation trends for vaccinations against 14 diseases. The estimates "underscore the need for ongoing catch-up, recovery and system-strengthening efforts", Xinhua news agency reported.