This study will evaluate the durability of antibody responses in children and adolescents after primary immunization with TBE vaccine

Inclusion Criteria:

• Healthy study subjects from the parent study who completed the primary vaccination series, with parental or legal guardian informed consent

Exclusion Criteria:

• Subjects who did not receive complete schedule of primary vaccination in the parent study
• Subjects enrolled in other investigational studies at the same time and within the last three months
• Subjects with any condition which, in the opinion of the investigator, might interfere with the evaluation of the study objectives