has vaccine antigen Oliver He An object property that specifies a vaccine antigen Asiyah Yu Lin This relation only works for those vaccine antigen that is physically part of a vaccine preparation. It does not include those antigens that are not part of vaccine. For example, a protein antigen expressed in a DNA vaccine is not a part of vaccine pe ser. In this case, the vaccine expresses the protein, but the gene is part of the vaccine, not the protein. For the case, we can use the relation 'DNA vaccine expresses protein antigen' under the relation 'expresses'.