The investigators seek to provide immunization for individuals who are at high risk of contracting hepatitis B virus (HBV) infection because of their illicit drug use. The investigators will be using the syringe exchange programs (SEPs) in Hartford and Bridgeport, CT and Chicago, IL to contact high risk individuals and refer them for vaccination. The primary purpose of the study is to compare the standard schedule of hepatitis B vaccination at 0, 1, and 6 months to an accelerated schedule of vaccination at 0, 1, and 2 months. The investigators hypothesize that the accelerated scheduling will result in improved completion rates without significant loss in vaccine efficacy.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
595
Standard dosing with Twinrix; comparison of standard and acceleration dosing schedule
Hispanic Health Council
Hartford, Connecticut, United States
DePaul University
Chicago, Illinois, United States
Case Western Reserve Universtiy
Cleveland, Ohio, United States
Vaccine Efficacy
Time frame: 8 months from study enrollment
Vaccine completion rate
Time frame: 8 months from study enrollment
Association of exchange status with completion
Time frame: 8 months from study enrollment
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