但这种感染是主要的传染源，并且感染后能产生足够的抗体而形成抵抗再次感染免疫力。
But, infections are major source of contagion and can result in sufficient antibody stimulation to cause immunity from further infections.
灭活苗可以中和剩余的母源抗体，或更易于激活机体免疫力的产生。
It is felt the killed vaccine either neutralize the remaining maternal antibody or just more easily starts the development of immunity.
外界刺激、宿主免疫力的降低等因素都可以使宿主由潜伏感染状态发病，成为带毒者和传播源，因此，对潜伏感染建立及维持机理的研究就显得尤为重要。
Hosts can be diseased from latency condition by the decreasing of host's immunity and stimulation of condition, and so on , then become a carrier and infectious source.
外界刺激、宿主免疫力的降低等因素都可以使宿主由潜伏感染状态发病，成为带毒者和传播源，因此，对潜伏感染建立及维持机理的研究就显得尤为重要。
Hosts can be diseased from latency condition by the decreasing of host's immunity and stimulation of condition, and so on , then become a carrier and infectious source.
应用推荐