A Phase 4 interventional study of FSME-IMMUN 0.5 ml in Tick-borne Encephalitis (TBE), sponsored by Pfizer. Completed at 2 sites in Poland. Open to participants aged 25 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-01-22.
Sponsored by Pfizer · Phase 4, Interventional, and Prevention
The purpose of this study is to evaluate TBE antibody persistence from 7 to 10 years after the first booster TBE vaccination with FSME-IMMUN 0.5ml.
51 studies on the registry are indexed under Encephalitis, Tick-Borne; 9 are open to participants now.
This study's enrollment of 243 is above the median of 192 across 32 interventional studies indexed under Encephalitis, Tick-Borne.
Browse Encephalitis, Tick-Borne studies →Pfizer is the lead sponsor of 3,334 studies on the registry; 149 are open to participants now.
Of its 601 completed or terminated interventional studies of FDA-regulated products, 391 (65%) have results posted.
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Subjects who participated in the first and second precursor studies will be eligible for participation in this study if:
Exclusion Criteria:
Subjects will be excluded from participation in this study if they:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Blood will be drawn to assess the seropersistence of TBE virus antibodies at 82, 94, 106 and 118 months after the first booster vaccination with FSME-IMMUN 0.5ml administered during the first precursor study. Timing of the second booster vaccination will depend on the level of serum TBE antibodies observed during the study. Blood will be drawn 21 - 35 days after vaccination to assess the booster response.
Biological: FSME-IMMUN 0.5 ml
Solution/suspension for injection (intramuscular injection into the deltoid muscle of the right or left upper arm). Dosage frequency of booster vaccination: dependent on serum TBE antibodies.
Seropositivity rate measured by neutralization test (NT) 82, 94, 106 and 118 months after the first booster TBE vaccination administered in the first precursor study and after the booster vaccination in this study
Time frame: 118 months
Seropositivity rate measured by ELISA test 82, 94, 106 and 118 months after the first booster TBE vaccination administered in the first precursor study and after the booster vaccination in this study
Time frame: 118 months
Antibody titers 82, 94, 106 and 118 months after the first booster TBE vaccination administered in the first precursor study and after the booster vaccination in this study measured by ELISA and by NT
Time frame: 118 months
Fold increase in antibody concentration after the booster vaccination administered as compared to before the booster vaccination in this study measured by ELISA and by NT
Time frame: 118 months
This study is completed, as verified in Jan 2021. You cannot join it, but the record below documents what was studied.
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