Conclusions
Vaccination coverage of the dTcaP booster vaccine for 25-year-olds was low in the Ardennes region in France in 2021 and the awareness campaign run by the CPAM did not improve vaccine uptake. A GP consultation was associated with dTcaP booster vaccine delivery which may show that there is a need of involving GPs in vaccination follow-ups. Systematic consultations with GPs for follow-ups could be proposed to insured adults aged 25 years in the future.