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相关概念视频

Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
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Immunological Memory01:23

Immunological Memory

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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
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Vaccinations01:51

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Active versus Passive Immunity01:31

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Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
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Active immunity refers to the resistance one develops...
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Immune Response Against Viral Pathogens01:29

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The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
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对SARS-CoV-2抗原的抗体减少并不反映中和率的减少:在怀孕期间接种疫苗后评估动态和动态幽默免疫反应的前性研究.

Gabriela Mattoso Coelho1, Hellen Geremias Dos Santos2, Allan Henrique Depieri Cataneo1

  • 1Laboratory of Molecular Virology, Carlos Chagas Institute/Fiocruz, Curitiba, Paraná, Brazil.

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孕妇对COVID-19疫苗表现出强烈的免疫反应,疫苗接种后中和IgG抗体显著增加. 这表明这种高风险群体对SARS-CoV-2的强大保护.

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这是COVID-19疫苗.在SARS-CoV-2中.幽默反应是一种幽默反应.孕产妇免疫力 孕产妇免疫力中和抗体中和抗体.怀孕 怀孕 怀孕 怀孕 怀孕

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科学领域:

  • 免疫学 免疫学 免疫学
  • 疫苗学 疫苗学 疫苗学
  • 孕产妇健康 孕产妇健康

背景情况:

  • 孕妇面临严重COVID-19的更高风险.
  • 最初的COVID-19疫苗试验排除了孕妇,限制了安全性和有效性数据.
  • 了解怀孕期间的疫苗诱导免疫力对于公众健康至关重要.

研究的目的:

  • 为了比较孕妇对BNT162b2 (Pfizer-BioNTech) 和CoronaVac (Sinovac Biotech) 疫苗的免疫反应.
  • 分析中和和IgG抗体对抗SARS-CoV-2疫苗接种后的动力学和标位.
  • 评估疫苗在怀孕期间的有效性和保护.

主要方法:

  • 一组怀孕妇女接受了BNT162b2或CoronaVac.
  • 测量了针对SARS-CoV-2抗原的IgG抗体,使用多重珠子测定.
  • 使用活病毒光减少中和试验 (FRNA) 量化中和抗体.
  • 在接种疫苗之前和每剂接种疫苗后30天收集样本.

主要成果:

  • 疫苗接种在孕妇中诱导了强大的幽默性免疫反应.
  • 在第一剂疫苗接种后,观察到IgG和中和抗体的显著增加.
  • 在接种疫苗后,观察到持续的中和抗体反应.
  • 抗尖峰IgG水平在第二剂后略有下降,而中和保持稳定.

结论:

  • 孕妇接种COVID-19疫苗会引起中和抗体的大量增加.
  • 这些发现支持SARS-CoV-2疫苗在怀孕期间的安全性和免疫性.
  • 进一步的研究可能会探索抗体的长期持久性和保护.