As observed with the chickens, the filterable agent, a virus, could seldom be recovered from the malignant tumor which it had induced.
在鸡身上观察到，一种叫滤过性病原体的病毒，很少能从它诱发的恶性肿瘤中恢复过来。
2
MICB is a stress-induced ligand of the natural killer (NK) cell activating receptor NKG2D and is critical for the NK cell killing of virus-infected cells and tumor cells.