GPS-1, Glycyrrhiza polysaccharide extract 1; ND, Newcastle disease; NDV, Newcastle disease vaccine; PHA-P, Phytin; mGM-CSF, Chicken recombinant proteins GM-CSF; il-4, Interleukin 4; chBM-DCs, immature chicken bone marrow dendritic cells. Here, GPS1 is linked to Newcastle disease.