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    Activation of T-cell immune response, illustration. — Stock Photo
    Activation of T-cell immune response, illustration.
    T-cells (turquoise) surrounding a tumour (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus — Stock Photo
    T-cells (turquoise) surrounding a tumour (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus — Stock Photo
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus
    Antibodies attacking coronavirus particle, illustration. — Stock Photo
    Antibodies attacking coronavirus particle, illustration.
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    Illustration of eosinophil white blood cell with purple lobed nuclei. — Stock Photo
    Illustration of eosinophil white blood cell with purple lobed nuclei.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Illustration of antibodies responding to an infection with the SARS-CoV-2 coronavirus (centre). The virus causes a mild respiratory illness (Covid-19) that can develop into pneumonia and be fatal in some cases — Stock Photo
    Illustration of antibodies responding to an infection with the SARS-CoV-2 coronavirus (centre). The virus causes a mild respiratory illness (Covid-19) that can develop into pneumonia and be fatal in some cases
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Illustration of antibodies attacking influenza virus. — Stock Photo
    Illustration of antibodies attacking influenza virus.
    Normal White blood cell — Stock Photo
    Normal White blood cell
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple. — Stock Photo
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple.
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    Illustration of a neutrophil. — Stock Photo
    Illustration of a neutrophil.
    Illustration of a dendritic cell, a type of white blood cell that is a component of the body's immune system — Stock Photo
    Illustration of a dendritic cell, a type of white blood cell that is a component of the body's immune system
    Antibodies attacking coronavirus particle, illustration. — Stock Photo
    Antibodies attacking coronavirus particle, illustration.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Alveolar tissue macrophage, digital illustration. — Stock Photo
    Alveolar tissue macrophage, digital illustration.
    Mast cell releasing histamine during allergic response, digital illustration. — Stock Photo
    Mast cell releasing histamine during allergic response, digital illustration.
    Illustration of eosinophil white blood cell with purple lobed nuclei. — Stock Photo
    Illustration of eosinophil white blood cell with purple lobed nuclei.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Illustration of antibodies (purple) responding to an infection with the SARS-CoV-2 coronavirus (center) — Stock Photo
    Illustration of antibodies (purple) responding to an infection with the SARS-CoV-2 coronavirus (center)
    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    Neutrophil and monocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Neutrophil and monocyte white blood cells in blood smear, digital illustration.
    Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system — Stock Photo
    Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system
    Eosinophil white blood cells in blood vessel, digital illustration showing lobed nuclei. — Stock Photo
    Eosinophil white blood cells in blood vessel, digital illustration showing lobed nuclei.
    3d illustration of antibodies attacking virus particles in bloodstream. — Stock Photo
    3d illustration of antibodies attacking virus particles in bloodstream.
    Illustration of antibodies (purple) responding to an infection with the SARS-CoV-2 coronavirus (center) — Stock Photo
    Illustration of antibodies (purple) responding to an infection with the SARS-CoV-2 coronavirus (center)
    Neutrophil and monocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Neutrophil and monocyte white blood cells in blood smear, digital illustration.
    Illustration of person being vaccinated against Covid-19. injection has stimulated production of different antibodies against proteins on SARS-CoV-2 virus causes Covid-19 — Stock Photo
    Illustration of person being vaccinated against Covid-19. injection has stimulated production of different antibodies against proteins on SARS-CoV-2 virus causes Covid-19
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Illustration of antibodies against SARS-CoV-2 virus that causes Covid-19 inside person wearing face mask. antibodies have been produced by body after vaccination, giving recipient immunity to disease — Stock Photo
    Illustration of antibodies against SARS-CoV-2 virus that causes Covid-19 inside person wearing face mask. antibodies have been produced by body after vaccination, giving recipient immunity to disease
    RNA vaccine, conceptual illustration. molecule of RNA (ribonucleic acid, blue helix) is being injected at right. The RNA is taken up and read by body cells, causing them to produce copies of viral proteins (red) — Stock Photo
    RNA vaccine, conceptual illustration. molecule of RNA (ribonucleic acid, blue helix) is being injected at right. The RNA is taken up and read by body cells, causing them to produce copies of viral proteins (red)
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    T-cells (turquoise) surrounding a tumour (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus — Stock Photo
    T-cells (turquoise) surrounding a tumour (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Illustration of antibodies (blue) attaching to a viral (purple) infected cell. Antibodies bind to specific antigens, for instance viral proteins displayed on the surface of infected cells, marking them for destruction by phagocyte immune cells. — Stock Photo
    Illustration of antibodies (blue) attaching to a viral (purple) infected cell. Antibodies bind to specific antigens, for instance viral proteins displayed on the surface of infected cells, marking them for destruction by phagocyte immune cells.
    Illustration of antibodies (y-shaped) responding to an infection with the new coronavirus SARS-CoV-2 — Stock Photo
    Illustration of antibodies (y-shaped) responding to an infection with the new coronavirus SARS-CoV-2
    Illustration of a dendritic cell, a type of white blood cell that is a component of the body's immune system — Stock Photo
    Illustration of a dendritic cell, a type of white blood cell that is a component of the body's immune system
    T lymphocyte (orange) attached to a cancer cell (blue), illustration. T lymphocytes are a type of white blood cell which matures in the thymus — Stock Photo
    T lymphocyte (orange) attached to a cancer cell (blue), illustration. T lymphocytes are a type of white blood cell which matures in the thymus
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus — Stock Photo
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    Alveolar tissue macrophage, digital illustration. — Stock Photo
    Alveolar tissue macrophage, digital illustration.
    Mast cell releasing histamine during allergic response, digital illustration. — Stock Photo
    Mast cell releasing histamine during allergic response, digital illustration.
    Illustration of antibodies (purple) responding to an infection with the SARS-CoV-2 coronavirus (center) — Stock Photo
    Illustration of antibodies (purple) responding to an infection with the SARS-CoV-2 coronavirus (center)
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Neutrophil is a granulocyte, a part of the innate immune system. — Stock Photo
    Neutrophil is a granulocyte, a part of the innate immune system.
    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    Close-up of a macrophage, illustration. — Stock Photo
    Close-up of a macrophage, illustration.
    Illustration of antigen-presenting cell activity of dendritic cells through membrane-bound histocompatibility complex molecules. — Stock Photo
    Illustration of antigen-presenting cell activity of dendritic cells through membrane-bound histocompatibility complex molecules.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Illustration of a dendritic cell (centre, purple) activating T-cells (teal). Dendritic cells recognise viruses and present information about their antigens to T-cells — Stock Photo
    Illustration of a dendritic cell (centre, purple) activating T-cells (teal). Dendritic cells recognise viruses and present information about their antigens to T-cells
    Illustration of person being vaccinated against Covid-19. injection has stimulated production of different antibodies against proteins on SARS-CoV-2 virus causes Covid-19 — Stock Photo
    Illustration of person being vaccinated against Covid-19. injection has stimulated production of different antibodies against proteins on SARS-CoV-2 virus causes Covid-19
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.