ABOUT THIS STUDY
Subjects who participated in the first and second precursor studies will be eligible for participation in this study if:
- they understand the nature of the study, agree to its provisions and provide written informed consent
- they received the first booster vaccination with FSME-IMMUN 0.5ml during the first precursor study and did not receive a second booster vaccination in the second precursor study
- blood was drawn after their first booster vaccination in the first precursor study
Subjects will be excluded from participation in this study if they:
- received any TBE vaccination since their first booster vaccination with FSME-IMMUN
- have a history of infection with or vaccination against other flaviviruses (e.g.
dengue fever, yellow fever, Japanese B-encephalitis) since their first booster
vaccination with FSME-IMMUN 0.5ml
- are known to be HIV positive since their first booster vaccination with FSME-IMMUN
- have a known or suspected problem with drug or alcohol abuse
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