نتایج جستجو برای: active immunity
تعداد نتایج: 520183 فیلتر نتایج به سال:
Abstract Immunity is the state of protection against infectious disease conferred either through an immune response generated by immunization or previous infection or by other non-immunological factors. This article reviews active and passive immunity and the differences between them: it also describes the four different commercially available vaccine types (live attenuated, killed/inactivated,...
The fate of W.E.E. virus has been followed in the brains of mice vaccinated to such an extent that they failed to resist a large intracerebral challenge dose of a viral variant with a rapid rate of multiplication but were fully protected against a similar amount of a "slow" strain. The growth rate of the "fast" variant in vaccinated animals paralleled that in non-vaccinated ones at a slightly l...
This report is concerned with the production of subclinical poliomyelitis in the chimpanzee, and immunity to such infection. Subclinical infection was produced in eight chimpanzees by the administration of virus orally or intracutaneously, and was measured by the production of a virus carrier state and the development of neutralizing antibodies. Immunity was tested by attempting to induce the c...
This study examined the acute immunological effects of two laboratory stressors, expected to evoke distinct patterns of cardiac autonomic activity; namely an "active coping" time-paced memory test, and a "passive coping" stressful video showing surgical operations. We measured salivary S-IgA, IgA-subclasses (IgA1, IgA2), and secretory component (SC). SC is responsible for the transport of S-IgA...
Background: With due attention to the prevalence of thalassemia in Iran and patients' importunate needs for blood intake, this study aimed to inspect contaminations due to repeated blood transfusion which does not sift in blood donation. One such contamination is cytomegalovirus infection, which is an important pathogen in immunosuppressive patients or receivers of transplanted organs. Methods...
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