An antigenic construct comprising a phospho-peptide wherein the phospho-peptide is modified through linkage to a lipophilic or hydrophobic moiety that facilitates insertion into the lipid bilayer of a liposome and reconstituted in a liposome such that the phospho-peptide is presented on the surface of the liposome, wherein said phospho-peptide has an amino acid sequence selected from the group consisting of: a. SEQ ID NO: 2 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 2 and has the same immunogenic activity as the unmodified sequence; b. SEQ ID NO: 3 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 3 and has the same immunogenic activity as the unmodified sequence; c. SEQ ID NO: 4 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 4 and has the same immunogenic activity as the unmodified sequence; d. SEQ ID NO: 5 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 5 and has the same immunogenic activity as the unmodified sequence; e. SEQ ID NO: 6 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 6 and has the same immunogenic activity as the unmodified sequence; f. SEQ ID NO: 7 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 7 and has the same immunogenic activity as the unmodified sequence; g. SEQ ID NO: 8 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 8 and has the same immunogenic activity as the unmodified sequence; and h. SEQ ID NO: 9 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 9 and has the same immunogenic activity as the unmodified sequence. a. SEQ ID NO: 2 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 2 and has the same immunogenic activity as the unmodified sequence; b. SEQ ID NO: 3 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 3 and has the same immunogenic activity as the unmodified sequence; c. SEQ ID NO: 4 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 4 and has the same immunogenic activity as the unmodified sequence; d. SEQ ID NO: 5 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 5 and has the same immunogenic activity as the unmodified sequence; e. SEQ ID NO: 6 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 6 and has the same immunogenic activity as the unmodified sequence; f. SEQ ID NO: 7 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 7 and has the same immunogenic activity as the unmodified sequence; g. SEQ ID NO: 8 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 8 and has the same immunogenic activity as the unmodified sequence; and h. SEQ ID NO: 9 or a variant thereof that comprises a conservative substitution, deletion or insertion of at least one but not more than 5 amino acids of SEQ ID NO: 9 and has the same immunogenic activity as the unmodified sequence.