The present invention relates to a fusion protein for use in the treatment and/or prevention of a hepatitis B virus infection comprising at least one hepatitis B PreS polypeptide or fragment thereof fused to at least one peptide consisting of an amino acid sequence having at least 80% identity to a sequence selected from the group consisting of SEQ ID No. 1, SEQ ID No. 2, SEQ ID No. 3 and SEQ ID No. 4.
