drugset / Trial / NCT04573205

Primary TBE Vaccination for the Elderly

NCT04573205 ↗

Phase 4 Unknown 90 enrolled Region Örebro County
Non-randomizedParallel-groupOpen-labelPrevention

Summary

Tick-borne Encephalitis (TBE) can be prevented by vaccine. Vaccine failure, defined as a case of TBE regardless of previous vaccination, has been described and seems to be more predominant with increasing age, suggesting a less effective immune response following with increasing age. In fact previous studies has shown a reduced antibody response in elderly individuals compared to younger when vaccinated against TBE. As a result, in Sweden, an extra vaccine dose has been recommended during the primary vaccine schedule to individuals \> 50 years of age. This alternative vaccine schedule has not been tested. The investigator aim to test if an extra vaccine dose in the primary vaccine schedule for those \> 50 years of age improves the immune response and offers a corresponding immunity to younger individuals following TBE vaccination.

Timeline

Start
2024-01
Primary completion
2024-01
Completion
2025-01

Publications

Drugs

EvaluationDrugModalityDoseRoute
Subject FSME-IMMUN Vaccine Vaccine 0.5 ml Intramuscular