Almost 1 in 5 children starting primary school are not fully protected against several serious diseases

In a recent update, the UK Health Security Agency (UKHSA) and NHS England have asked parents to check their child’s vaccine records and catch up on any missed vaccinations with their GP practice.
The call comes as the new school term starts and new data shows that whilst most children are fully vaccinated by the time they start school, many are still left unvaccinated and vulnerable to catching serious illnesses.
The latest annual uptake data on childhood vaccines (April 2024-March 2025) published by the UK Health Security Agency, shows 18.6% of children, almost 1 in 5, have not received their pre-school booster jab.
The 4-in-1 pre-school booster helps protect against 4 serious illnesses - polio, whooping cough, tetanus and diphtheria. Given from 3 years 4 months of age, the vaccine boosts the protection provided by previous vaccines given to babies. It ensures children have the essential protection they need when starting primary school. Without this booster, children are not fully protected.
Dr Mary Ramsay, Director of Immunisation at UK Health Security Agency, said:
Ensuring all our children starting primary school are fully protected is essential to keep them safe and give them the best opportunity to thrive at school. We know that most parents want to do what is best for their children and do have confidence and trust in NHS childhood vaccinations, which save thousands of lives and prevent tens of thousands of hospital admissions every year. But it can be hard juggling busy lives and work, finding time to book and get to the GP appointments.
Far too many children will not be fully protected and safe when starting school and are at risk of serious diseases, such as measles and whooping cough, that have in recent years caused outbreaks. Measles, being the most infectious disease, is the ‘canary in the coalmine’ and a wake-up call that urgent action is needed to stop the very real risk of other diseases re-emerging.
That is why there needs to be a concerted effort in providing these vitally important vaccines, to make time to speak and reassure any parents who may have concerns and make it as easy as possible for their children to get vaccinated.
Parents should check their children are up to date with all their jabs and, if not, contact their GP practice as soon as possible.
How do I book a vaccination appointment?
For more information about vaccinations, including why they’re important and how to get them, visit the NHS.