<P> In immunology , an antigen is a molecule capable of inducing an immune response ( to produce an antibody ) in the host organism . Sometimes antigens are part of the host itself in an autoimmune disease . </P>
<P> In immunology , an antigen is a molecule capable of inducing an immune response ( to produce an antibody ) in the host organism . Sometimes antigens are part of the host itself in an autoimmune disease . </P>
any substance that can provoke an immune response is an
any substance that can provoke an immune response is an
antigen
antigen