HepB-CpG Series for Healthcare Workers Who Are Hepatitis B Vaccine Nonresponders

University of Wisconsin, Madison49 enrolled

Overview

This study is being done to determine if healthcare workers who have previously failed to respond to hepatitis B vaccine series will respond to a hepatitis B with CpG adjuvant (hepB-CpG) (Heplisav-B)

Study Intervention Each individual who has completed at least 5 doses hepB vaccine with aluminum adjuvant series but is anti-HBs negative will be contacted by EHS staff and invited to receive the hepB-CpG two dose series on a 0 and 1 month schedule. Antibody to the surface antigen will be measured after the first dose during the visit for the administration of the second dose. One month after completion of the series, each immunized individual will have another anti-HBs measured. Total Number of Subjects Up to 130 individuals will be recruited and enrolled. Study Population Healthcare workers who have received at least 5 doses of hepatitis B vaccine with aluminum adjuvant and have antiHBs \< 10mIU/ml.

Study Type

INTERVENTIONAL

Allocation

Purpose

PREVENTION

Masking

NONE

Enrollment

Conditions

Healthcare Worker, Hepatitis B Vaccine, Nonresponder

Interventions

Recombinant hepatitis B vaccine with CpG adjuvantBIOLOGICAL

Each participant will receive two doses of hepB-CpG separated by one month and blood draw to measure antibody to the hepatitis B surface antigen prior to dose 2 and one month after dose 2.

Eligibility

Sex: ALLMin age: 18 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Willing to provide informed consent * Willing to comply with all study procedures and be available for the duration of the study * Healthcare workers who have received at least 5 doses of hepatitis B vaccine with aluminum adjuvant and have antiHBs \< 10mIU/ml * Females of childbearing potential will be asked about the possibility of pregnancy as is the standard of care for immunization services. If a female indicates that she may be pregnant, study participation will be postponed until pregnancy is completed or the female reports that she is not pregnant. Exclusion Criteria: * Women who are pregnant or planning on becoming pregnant during the study * Allergy to the vaccine or a component of the vaccine * Not suitable for study participation due to other reasons, such as inability or unwillingness to comply with the study procedures, at the discretion of the investigators

Locations (1)

University of Wisconsin

Madison, Wisconsin, United States

Outcomes

Primary Outcomes

Number of Participants Who Failed to Respond to 5 or More Doses of Hepatitis B Vaccine With Aluminum Adjuvant Who Respond to Hepatitis B Vaccine With CpG Adjuvant Series

Response is defined as AntiHBs \>10 mIU/ml following two doses of hepB-CpG

Time frame: one month after dose 2 (up to 84 days on study)

Secondary Outcomes

Number of Participants Who Respond to a Single Dose of hepB-CpG

Response is defined as AntiHBs \>10 mIU/ml following a single dose of hepB-CpG

Time frame: one month after dose 1 (up to 42 days on study)

Proportion of Participants Who Are Nonresponders With Each Risk Factor

A multivariate model will be developed by measuring the proportion of participants who are nonresponders with each risk factor. Potential risk factors include including age, smoking status, sex, diabetes, immunosuppression.

Time frame: one month after dose 2 (up to 84 days on study)

Data from ClinicalTrials.gov

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