definiens: means [ one or more Listeria monocytogenes bacterium that ~¥ been engineered to express EphA2 in a manner that elicits an immune response against EpJ.:Lb&in humans ] . An EphA2 Vaccine may comprise either ( a ) [ a single strain of Listeria 11'.l~1)(!C)'togenes that expresses EphA2 ] ; ( b ) [ a single strain of Listeria monocytogenes that ~~~ses : aphA2 in addition to one ( 1 ) Public Domain Antigen and/or one ( 1 ) Proprietary ~~g ~ nselected by MedlmrnUne pursuant to Sections 2.5(a ) and 2.5(b ) ] ; or ( c ) [ more than one LiSleriti monocytogenes strain, which have been collectively engineered to express EphA2 and, QU~,:(l)Public Domain Antigen and/or one ( 1 ) Proprietary Antigen selected by Medlinmune p~~tto Sections 2.5(a ) and 2.5(b ) where all of such strains are administered or sold together ~1~~~;y@cine product contairiing a Listeria monocytogenes bacterium that has been engineered 1:(j;~~res$ EphA2 ]