Younger people, however, had no such protective immunity.
而较年轻的人则无此种免疫保护。
The mechanism of its inducing protective immunity needs to be studied further.
其诱导保护性免疫的机制尚待进一步研究。
Several experiments showed that the particles could induce protective immunity.
很多实验显示，这些颗粒可以诱发保护性免疫。
Since humans haven't encountered the new virus before, they have little protective immunity.
由于人类在这之前没有遭遇这样的新病毒，他们的保护性免疫能力就很差。
Protective immunity against RSV infection after infection only last several months, so that reinfection often occurred.
感染后保护性免疫仅能持续数月，再感染经常发生。
This article introduced the new developments on the study of protective immunity of T. spiralis newborn larvae antigens.
本文介绍了旋毛虫新生幼虫抗原保护性免疫研究的新进展。
Objective To explore protective immunity effect against Capillaria hepatica infection induced by soluble egg antigen (SEA) in rats.
目的探讨肝毛细线虫虫卵可溶性抗原(SEA)诱导保护性免疫的效果。
AIM: To observe the level of immune responses and protective immunity in mice induced by laser-irradiated Toxoplasma tachyzoites (LIT).
目的：探讨激光照射弓形虫速殖子(LIT)的免疫保护力及其诱导的免疫应答水平。
Mice infected with rodent malaria parasites may provide a valuable animal model for dissecting protective immunity against human malaria.
啮齿类疟原虫感染小鼠为深入探讨抗人疟保护性免疫应答机制，提供了一种宝贵的实验动物模型。
Recently published studies indicate that 20-40% of populations in some areas have been infected by the H1N1 virus and thus have some level of protective immunity.
最近发布的研究报告显示，一些地区20- 40%的人口曾感染过H1N1病毒，因此具有一定免疫力。
It has been known for decades that killed Listeria vaccines don't provide protective immunity. It was believed that failure to reach the cytosol was the major reason.
数十年前我们就已经知道灭活李斯特菌制成的疫苗不能产生保护性免疫，其主要原因被认为是其不能进入细胞质中。
Anti-idiotypic antibody NP30 was confirmed with protective immunity of both anti-infection and anti-pathology and may act as a vaccine candidate for schistosomiasis japonica.
以上研究证明日本血吸虫单克隆抗独特型抗体np30具有较好的抗感染免疫和抗病免疫功效，可作为日本血吸虫病疫苗候选分子。
Therefore, a better understanding of the mechanisms that induce protective immunity to malaria infection will provide necessary and primary data for effective control malaria.
因此，进一步阐明诱导抗疟保护性免疫应答的相关机制，无疑将为疟疾的有效控制提供必须的前提依据。
CONCLUSION: Cellular immune response in the skin of the mice immunized with UV-attenuated cercariae might play an important role in the protective immunity against challenge infection.
结论：提示皮肤组织的细胞免疫反应在血吸虫减毒尾蚴免疫的宿主抗攻击感染保护性免疫中起重要作用。
Envelope glycoprotein E2(gp55) of Classical swine fever virus(CSFV) is the most antigenic protein being responsible for eliciting neutralizing antibodies and conferring protective immunity.
CSFV囊膜糖蛋白E2是诱导中和抗体及激发保护性免疫应答的主要抗原蛋白。
GM-SCF boosts innate immunity to make it immediately effective against the virus, and its protective effect has not been shown to be strain dependant so far.
GM - SCF能强化先天免疫性直接有抗病毒作用，并且它的保护作用迄今没有表明有菌株依赖。
The same number of preterm infants and full-term infants in the study reached a level of immunity considered protective against the diseases.
此研究中达到一定免疫水平的早产儿和足月婴儿数量相同。
Meanwhile, they also affect the acquired immunity through the chemotaxis of leukocytes and promoting the proliferation of the immune cells to adjust the host immune system and play a protective role.
亦可通过趋化白细胞、促进免疫细胞增殖等来影响获得性免疫，从而调节宿主免疫系统发挥保护作用。
Furthermore, the immunity of different ports in protective device has been thoroughly studied in this desertion.
从敏感设备入手对保护的各个端口的抗扰度进行了研究。
Furthermore, the immunity of different ports in protective device has been thoroughly studied in this desertion.
从敏感设备入手对保护的各个端口的抗扰度进行了研究。
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