The recommended vaccination schedule for adults includes giving three doses of diphtheria, tetanus, and poliomyelitis vaccine (Td/IPV) spaced 4 weeks apart, and two doses of measles, mumps, and rubella (MMR) vaccine spaced at least 4 weeks apart, for those who have missed childhood immunisations NICE CKS.
For individuals aged 25 years or over, a two-dose schedule of HPV vaccine (spaced 6 to 24 months apart) is recommended if they missed vaccination in childhood, with the course to be resumed if interrupted, but not repeated NICE CKS.
Catch-up vaccinations for other vaccines, such as MenACWY, are also advised for those who missed initial doses, especially in the context of specific programmes like the MenACWY catch-up scheme for older adolescents and university entrants up to age 25 1.
In cases of uncertain or incomplete immunisation history, it is recommended to assume the individual has not been vaccinated and to provide the full course of vaccines as outlined above NICE CKS.