definiens: shall mean the treatment or prevention of a disease by means of Ex VivoDelivery or In Vivo Delivery ( via viral or nonviral gene transfer systems ) of compositions comprising either ( a ) GeneticMaterial that encodes an antibody, wherein such antibody serves a material function in the treatment or prevention ofsuch disease ; ( b ) Genetic Material that encodes a moiety other than an antibody, wherein the moiety serves amaterial function in the treatment or prevention of such disease and wherein such composition incorporates anantibody ( or Genetic Material that encodes such antibody ), which antibody is used as a targeting vehicle for thecomposition ; or ( c ) Genetic Material that encodes an antibody that serves a material function in the treatment orprevention of such disease, wherein such composition also incorporates an antibody ( or Genetic Material thatencodes such antibody ), which antibody is used as a targeting vehicle for the composition