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Related Concept Videos

Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
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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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Introduction to Innate and Adaptive Immunity01:21

Introduction to Innate and Adaptive Immunity

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The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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Vaccinations01:51

Vaccinations

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Overview
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Related Experiment Video

Updated: Jan 12, 2026

Tailoring In Vivo Cytotoxicity Assays to Study Immunodominance in Tumor-specific CD8+ T Cell Responses
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Tailoring In Vivo Cytotoxicity Assays to Study Immunodominance in Tumor-specific CD8+ T Cell Responses

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Evolving our understanding of trained immunity.

Eva Kaufmann1,2, Yahya Sohrabi3, Jorge Domínguez-Andrés4

  • 1Meakins-Christie Laboratories, RI-MUHC, and Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, Canada.

Elife
|November 5, 2025
PubMed
Summary

This focus issue explores innate immune system memory and how trained immunity can be used to develop novel vaccines and therapies.

Area of Science:

  • Immunology
  • Vaccinology
  • Infectious Diseases

Background:

  • The innate immune system, traditionally viewed as non-specific, exhibits memory-like properties.
Keywords:
epigenetic changesimmunologyimmunotherapyinfectious diseaseinflammationinnate immune cellsmicrobiologytrained immunity

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  • This phenomenon, termed trained immunity, involves functional reprogramming of immune cells.
  • Understanding innate immune memory is crucial for advancing immunology.