The generation of cell-mediated immunity against many infectious pathogens involves the production of interleukin-12 ( IL-12 ) , a key signal of the innate immune system .
the generation of cell-mediated immunity against many infectious pathogens involves the production of interleukin-12 ( il-12 ) , a key signal of the innate immune system .
O O O O O O O B-mono_cell I-mono_cell O O O O B-protein_molecule O B-protein_molecule O O O O O O O B-body_part I-body_part I-body_part O