When a child presents with a missed vaccination, the recommended step is to continue the course of immunisation without starting again, simply resuming and completing it as soon as possible NICE CKS.
If the child's immunisation history is unclear, assume they have not been vaccinated and plan a full course of immunisations, including three doses of diphtheria, tetanus, pertussis, poliomyelitis, Hib, and hepatitis B vaccines spaced 4 weeks apart, two doses of MenB vaccine spaced 8 weeks apart (if applicable), one dose of pneumococcal conjugate vaccine, Hib/MenC, and MMR vaccines, with rotavirus vaccine not required at 1–2 years of age NICE CKS.
For children who have started but not completed primary courses, continue the vaccination schedule; there is no need to repeat doses NICE CKS.
In cases where the child's vaccination history cannot be clarified, it is recommended to give the full set of catch-up vaccines as outlined above NICE CKS.