The immunogenicity of HBV vaccine seems to be lower in CHC patients compared to healthy subjects. SVR following IFN plus RIB treatment does not affect the antibody response to HBV vaccine. Infection by genotype-1 seems to negatively influence the seroconversion rates. Vaccination against HBV during PEG plus RIB combination treatment is not beneficial in terms of anti-HBs seroconversion rates.

The serological profile of hepatitis B virus infection among Greek hepatitis C virus-infected injecting drug users is changing. The proportion of successfully vaccinated hepatitis B virus injecting drug users, although significantly higher than the previous decades, is still relatively low. Vaccination policy in this high-risk group for viral hepatitis is urgently needed.

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