An Extension Study to Determine the Persistence of Tick-borne Encephalitis (TBE)-Specific Antibody Responses Among Children and Adolescents Previously Immunized Against TBE

A Phase IV, Open-label, Multi-center Follow-up Study to Determine the Persistence of Tick-borne Encephalitis (TBE)-Specific Antibody Responses Among Children and Adolescents Previously Immunized Against TBE

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