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Completed

NCT Number: NCT04490499

A Hepatitis B Vaccine Challenge Study After Previous Vaxelis® Vaccination (V419-013)

The purpose of this study is to demonstrate the durability of protection against hepatitis B virus (HBV) infection approximately 8-9 years after vaccination with Vaxelis®. This is an estimation study, and no formal hypothesis testing was performed.

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Key information

Conditions

Hepatitis B Blood-Borne Infections Communicable Diseases DNA Virus Infections Digestive System Diseases Hepadnaviridae Infections Hepatitis Hepatitis, Viral, Human Infections Liver Diseases Virus Diseases

Age range

8 year–10 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Tampereen yliopisto Kokkolan rokotetutkimusklinikka ( Site 0009), Kokkola, Keski-Pohjanmaa, Finland

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Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Is healthy (based on a review of medical history and targeted physical examination) based on the clinical judgment of the investigator.
  • Has participated in Protocol V419-007 and received a 3 + 1 Vaxelis® schedule or participated in Protocol V419-008 and received a 2 + 1 Vaxelis® schedule.
  • The participant (or legally acceptable representative if applicable) provides written informed consent/assent for the study.

Exclusion criteria

  • Has a history of diagnosis (clinical, serological, or microbiological) of HBV infection.
  • Has a known or suspected impairment of immunological function (e.g., human immunodeficiency virus (HIV), splenectomy).
  • Has a known hypersensitivity to any component of the study vaccine.
  • Has a known or suspected blood dyscrasias, leukemia, lymphomas of any type or other malignant neoplasms affecting the haematopoietic and lymphatic system.
  • Has a bleeding disorder contraindicating intramuscular vaccinations.
  • Has received any hepatitis B vaccine after participation in Protocol V419-007 or V419-008.
  • Is or has an immediate family member (e.g., spouse, parent/legal guardian, sibling, or child) who is investigational site or Sponsor staff directly involved with this study.

Treatment and study plan

HBVAXPRO™

Biological

Single 0.5 mL intramuscular dose

Other names: Hepatitis B virus (HBV) vaccine; V232

Primary outcomes

  1. Percentage of Participants With a Protective Hepatitis B Surface Antibody Level of ≥10 Milli International Units/mL (mIU/mL) at 30 Days Post-Challenge With HBVAXPRO™

    Time frame: Day 30

    Participant serum samples were collected for analysis with an enhanced chemiluminescence (ECi) assay to determine the concentration of antibodies to hepatitis B surface antigen (HBsAg). Response rate was the percentage of participants with a protective hepatitis B surface antibody (anti-HBs) level of ≥ 10 mIU/mL at Day 30 post-challenge.

Secondary outcomes

  1. Geometric Mean Concentration of Antibodies to Hepatitis B Surface Antigen

    Time frame: Day 1 and Day 30

    Participant serum samples will be assessed with an ECi assay for anti-HBs geometric mean concentrations (GMCs) pre-challenge on Day 1 and 30 days post-challenge with HBVAXPRO™ in mIU/mL.

Sponsors and collaborators

Lead sponsor

Merck Sharp & Dohme LLC

Industry

Registry information

Official study title

A Hepatitis B Vaccine Challenge Study to Demonstrate the Durability of Protection Against Hepatitis B Virus Infection in Healthy Children Vaccinated Approximately 9 Years Previously With a 2- or 3-Dose Infant Series and Toddler Dose of Vaxelis®

Important dates

Study start
2020
Primary completion
2020
Study completion
2020
First posted
Jul 29, 2020
Registry last updated
Jul 27, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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