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TBE Antibody Persistence and Booster Vaccination Study in Children and Adolescents (Follow-up to Study 209)

This study has been completed.
Information provided by:
Pfizer Identifier:
First received: September 8, 2005
Last updated: May 20, 2015
Last verified: May 2015

The purpose of this study is to assess the seropersistence of TBE antibodies in children and adolescents aged 1 to 15 years at the time of their first vaccination, 24 months and 34 months after completion of primary immunization with FSME-IMMUN 0.25 ml (3 vaccinations during the predecessor study 209), as well as the immune response to a booster vaccination with FSME-IMMUN 0.25 ml or FSME-IMMUN 0.5 ml administered 36 months after the third vaccination (in Study 209).

Protocol amendment of October 2006: The study has been prolonged for children and adolescents who still showed highly positive TBE virus antibody concentrations at approximately 3 years after the third vaccination and therefore did not receive a booster vaccination at this time point. Further follow-up of TBE antibody persistence is now included for these subjects at 46 and 58 months after the third vaccination (in Study 209), as well as a booster vaccination offered at either 48 or 60 months after the third vaccination (in Study 209), depending on individual TBE antibody levels.

Condition Intervention Phase
Encephalitis, Tick-Borne
Biological: Tick-Borne Encephalitis (TBE) Vaccine (Inactivated)
Phase 4

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: Open-label Follow-up Study to Investigate the Seropersistence of TBE Antibodies and the Booster Response to a Tick-borne Encephalitis Vaccine in Children and Adolescents Aged 3 - 18 Years

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Seropositivity rate measured by ELISA and/or NT according to Adner et al., 2001 at each available time point after the third vaccination in study 209 and separately at each available time point after the booster vaccination in this study [ Time Frame: TBE virus antibody tests at pre-determined intervals with the last test at 21-35 days after the booster vaccination in this study ]

Estimated Enrollment: 375
Study Start Date: May 2005
Study Completion Date: November 2008
Primary Completion Date: July 2008 (Final data collection date for primary outcome measure)
Intervention Details:
    Biological: Tick-Borne Encephalitis (TBE) Vaccine (Inactivated)
    Subjects receive one vaccination with either FSME-IMMUN 0.25 ml or FSME-IMMUN 0.5 ml, depending on their age.

Ages Eligible for Study:   3 Years to 18 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Participated in Baxter study 209 and:
  • They and/or their parents / legal guardians understand the nature of the study and agree to its provisions
  • Written informed consent is available from the parents / legal guardians according to national law
  • Written informed assent is available from the child/adolescent according to age and capacity of understanding
  • They received the third vaccination with FSME-IMMUN 0.25 ml during the course of Baxter study 209
  • Blood was drawn after their third vaccination during the course of Baxter study 209
  • They showed an ELISA concentration > 126 VIE U/ml and / or a NT titer >=10 after the third vaccination in Baxter study 209
  • They or their parents / legal guardians agree to keep a Subject Diary

Exclusion Criteria:

  • Received any TBE vaccination since their third vaccination with FSME-IMMUN 0.25 ml
  • Have a history of infection with or vaccination against other flaviviruses (Dengue fever, yellow fever and / or Japanese B-encephalitis virus) since their third vaccination with FSME-IMMUN 0.25 ml
  • Are known to be HIV positive (a special HIV test is not required for the purpose of the study) since their third vaccination with FSME-IMMUN 0.25 ml
  • Received a blood transfusion or immunoglobulins within 30 days of the first and second blood draw (as applicable)
  • Have a known or suspected problem with drug or alcohol abuse (> 4 liters wine / week or equivalent level of other alcoholic beverages)
  • Have participated in another Baxter vaccine study within the last six months (with the exception of follow-up studies)

Subjects will not be eligible for booster vaccination if they:

  • Do not meet the inclusion / exclusion criteria
  • Are not clinically healthy, (i.e. the physician would have reservations vaccinating with a TBE vaccine outside the scope of a clinical trial)
  • Suffer from a disease (e.g. autoimmune disease) or are undergoing a form of treatment (e.g. systemic corticosteroids) that can be expected to influence immunological functions
  • Have shown an allergic reaction to one of the components of the vaccine since their third vaccination in Baxter study 209
  • Have donated blood or plasma within 30 days of the booster vaccination if female of childbearing potential - are pregnant or breastfeeding before the booster vaccination (positive pregnancy test result at the medical examination before the booster vaccination)
  • Are simultaneously participating in another clinical trial including administration of an investigational product within six weeks prior to the booster vaccination until the end of the study

Subjects who meet the inclusion/exclusion criteria, but have a febrile illness (body temperature >=38.0°C, measured orally) at the scheduled time of vaccination will not be vaccinated until their body temperature returns to normal.

Subjects who received any vaccination within 4 weeks prior to the booster vaccination will not be vaccinated until an interval of four weeks has passed.

If subjects received antipyretics within 4 hours prior to the intended TBE vaccination, the vaccination should be performed at a later time.

Females of childbearing potential will only be vaccinated if they agree to employ adequate birth control measures from 4 weeks before the booster vaccination until the end of the study.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00161967

Grieskirchner Strasse 17
Wels, Upper Austria, Austria, 4600
Hauptstrasse 240
Kehl, Germany, 77694
Niepubliczny ZOZ
Zamosc, Poland, 22-400
Sponsors and Collaborators
Principal Investigator: Baxter BioScience Investigator Baxter BioScience
  More Information

Responsible Party: Martin Kraft, Clinical Project Manager, Baxter Healthcare Corporation Identifier: NCT00161967     History of Changes
Other Study ID Numbers: 700401
Study First Received: September 8, 2005
Last Updated: May 20, 2015

Keywords provided by Pfizer:
tick-borne encephalitis

Additional relevant MeSH terms:
Encephalitis, Tick-Borne
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Encephalitis, Arbovirus
Arbovirus Infections
Virus Diseases
Tick-Borne Diseases
Encephalitis, Viral
Central Nervous System Viral Diseases
RNA Virus Infections
Flavivirus Infections
Flaviviridae Infections
Infectious Encephalitis
Central Nervous System Infections
Immunologic Factors
Physiological Effects of Drugs processed this record on May 25, 2017