草鱼出血病是一种病毒性鱼病，它严重影响着草鱼的成活率，尤其是对一龄草鱼种的危害。目前比较有效的防治方法是将出血病疫苗注射到鱼体使其获得后天的免疫保护力，但这种注射法需要一尾一尾地进行，费工费时还易损伤鱼体，对当年草鱼和大规模的鱼种生产难以应用。因此，研究? Grass carp hemorrhagic disease is a viral fish disease, which seriously affects the survival rate of grass carp, especially for first-graded species of grass carp. At present, the more effective prevention and cure method is to inject the hemorrhagic disease vaccine into the fish so that it can acquire the acquired immunoprotective power. However, this injection method needs to be carried out end to end, and the time-consuming and time-consuming injury is also easy to damage the fish body. Large-scale species production is difficult to apply. So, research?