More importantly, this live attenuated virus provided effective protection when it was administered to birds before they had hatched.
更重要的是，这种减毒活病毒结种于未孵化的鸟类后可提供有效的预防。
The virus was analyzed by the animal pathogenicity test, virus attenuation, protection of the attenuated virus and virulence return experiment.
对分离的痘病毒进行动物致病性试验、病毒分离传代和致弱试验、致弱毒保护力试验和返强试验。
Most will be inactivated virus vaccines made in eggs, some will be killed virus vaccines made in cell cultures and a few will be live attenuated virus vaccines.
多数是在鸡胚中生产的灭活病毒疫苗，一些是在细胞培养基中生产的灭活疫苗，还有几个减活病毒疫苗。
Objective To establish a specific method for identifying varicella-zoster virus (VZV) strains and analyze the genetic characteristics of VZV84-7, an attenuated VZV strain isolated in China.
目的建立水痘带状疱疹病毒(VZV)毒株的特异性鉴定方法，研究我国分离的VZV84 7减毒株(VZV84 7株)基因特征。
The effect of mucosal immune of porcine reproductive and respiratory syndrome virus (PRRSV) attenuated and disactived vaccine was investigated by histological method.
应用组织学方法比较观察了猪繁殖与呼吸综合征病毒（PRRSV）弱毒细胞疫苗与灭活疫苗生殖道黏膜免疫的效果。
Measles vaccine is a live attenuated vaccine, vaccination against measles virus can stimulate the body to generate antibodies that protect the body from infection.
麻疹疫苗属减毒活疫苗，接种后可刺激机体产生抗麻疹病毒抗体，保护机体免遭感染。
Conclusion The attenuated measles virus strain is different from strong virus strain.
结论麻疹病毒的减毒株与强毒株存在差异。
Objective to identify live attenuated hepatitis a (HAV) vaccine virus seed and detect adventitious agents, monoclonal antibody is used to neutralize instead of human and rhesus monkey immune serum.
目的利用单克隆抗体代替常规的人、猴免疫血清进行甲型肝炎减毒活疫苗毒种外源因子检查及鉴别试验。
Objective To observe the adverse reaction and immunogenicity induced by live attenuated measles vaccine prepared with purified virus seeds of Chang-47 strain in infants aged 8 ~ 10 months.
目的观察麻疹长- 47株纯化毒种制备的麻疹减毒活疫苗在8 ~10月龄人群中的接种反应及免疫原性。
The immune response of attenuated JE vaccine virus strain was reported.
乙脑病毒减毒株注入脑内后，病毒繁殖受抑并被清除；
The dynamic changes of tissue structure in 4 days old ducklings which were infected with chicken embryo attenuated strain MY of duck hepatitis virus were observed.
对鸭肝炎鸡胚化弱毒株MY接种4日龄雏鸭后的组织变化进行了动态观察比较研究。
In order to study the attenuation of neurovirulence of SA14 14 2 attenuated vaccine virus, monkeys and mice were tested with the strain and its parent SA14 virulent strain.
为了解乙型脑炎（乙脑）减毒活疫苗弱毒株SA14142神经毒力的减弱程度，本文对弱毒株及其原株SA14强毒株进行了猴体和小白鼠的致病性和病理学变化的比较试验。
In order to study the attenuation of neurovirulence of SA14 14 2 attenuated vaccine virus, monkeys and mice were tested with the strain and its parent SA14 virulent strain.
为了解乙型脑炎（乙脑）减毒活疫苗弱毒株SA14142神经毒力的减弱程度，本文对弱毒株及其原株SA14强毒株进行了猴体和小白鼠的致病性和病理学变化的比较试验。
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