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    Digital illustration showing abundant lymphoblast cells in human blood in acute lymphoblastic leukaemia. — Stock Photo
    Digital illustration showing abundant lymphoblast cells in human blood in acute lymphoblastic leukaemia.
    Dendritic cells, illustration. Dendritic cells are a component of the body's immune system. The cell gets it name from the long membrane extensions off the cell body, which look like the dendrites of a nerve cell — Stock Photo
    Dendritic cells, illustration. Dendritic cells are a component of the body's immune system. The cell gets it name from the long membrane extensions off the cell body, which look like the dendrites of a nerve cell
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    3d illustration of leukocyte cells secreting allergen antibodies while allergy. — Stock Photo
    3d illustration of leukocyte cells secreting allergen antibodies while allergy.
    Immune system cell, computer illustration. — Stock Photo
    Immune system cell, computer illustration.
    Neutrophil and monocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Neutrophil and monocyte white blood cells in blood smear, digital illustration.
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte. — Stock Photo
    Colored scanning electron micrograph of human red blood cells erythrocytes, white blood cells leukocytes and platelet thrombocyte.
    HIV virus particles — Stock Photo
    HIV virus particles
    White blood cells, digital illustration. — Stock Photo
    White blood cells, digital illustration.
    Antibody blocking programmed cell death, illustration. — Stock Photo
    Antibody blocking programmed cell death, illustration.
    Lymphocyte white blood cell — Stock Photo
    Lymphocyte white blood cell
    Coloured scanning electron micrograph of macrophage white blood cell. — Stock Photo
    Coloured scanning electron micrograph of macrophage white blood cell.
    Coloured scanning electron micrograph of human red blood cells, white blood cells and platelets. — Stock Photo
    Coloured scanning electron micrograph of human red blood cells, white blood cells and platelets.
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia. — Stock Photo
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia.
    Dendritic cell presenting antigen to T cell, computer illustration. Dendritic cells play a crucial role in initiating immune responses against viruses. They recognise incoming viruses and present their antigens to T cells. — Stock Photo
    Dendritic cell presenting antigen to T cell, computer illustration. Dendritic cells play a crucial role in initiating immune responses against viruses. They recognise incoming viruses and present their antigens to T cells.
    HIV virus particles — Stock Photo
    HIV virus particles
    Activated macrophage attacking bacteria — Stock Photo
    Activated macrophage attacking bacteria
    White blood cell — Stock Photo
    White blood cell
    T-cell receptor-MHC-antigen complexes — Stock Photo
    T-cell receptor-MHC-antigen complexes
    Pars distalis of the pituitary gland — Stock Photo
    Pars distalis of the pituitary gland
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Dendritic cell on plain background, digital illustration. — Stock Photo
    Dendritic cell on plain background, digital illustration.
    Eosinophil white blood cell, digital illustration. — Stock Photo
    Eosinophil white blood cell, digital illustration.
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia. — Stock Photo
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia.
    3d illustration showing increase of non-functional white blood cells in leukaemia. — Stock Photo
    3d illustration showing increase of non-functional white blood cells in leukaemia.
    3d illustration of white blood cells leukocytes secreting antibodies to destroy allergen in human body. — Stock Photo
    3d illustration of white blood cells leukocytes secreting antibodies to destroy allergen in human body.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Cancerous white blood cell in leukaemia — Stock Photo
    Cancerous white blood cell in leukaemia
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    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
    White blood cell and proteins, digital illustration. — Stock Photo
    White blood cell and proteins, digital illustration.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Illustration of cancer cell being attacked by white blood cells.
    Monocyte in human blood, computer illustration. — Stock Photo
    Monocyte in human blood, computer illustration.
    HIV particles in the bloodstream — Stock Photo
    HIV particles in the bloodstream
    Mucosa of the trachea — Stock Photo
    Mucosa of the trachea
    Antibodies attacking cancer cell, computer illustration — Stock Photo
    Antibodies attacking cancer cell, computer illustration
    Eosinophilia blood smear with numerous eosinophils, digital illustration. — Stock Photo
    Eosinophilia blood smear with numerous eosinophils, digital illustration.
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Lymphocytes attacking a cancer cell — Stock Photo
    Lymphocytes attacking a cancer cell
    Basophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Basophil white blood cell and red blood cells, digital illustration.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Basophil white blood cell, digital illustration. — Stock Photo
    Basophil white blood cell, digital illustration.
    Digital illustration showing destruction of lymphoblast cells, acute lymphoblastic leukaemia treatment concept. — Stock Photo
    Digital illustration showing destruction of lymphoblast cells, acute lymphoblastic leukaemia treatment concept.
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    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.
    Monocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Monocyte white blood cell in blood smear, digital illustration.
    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.
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration.
    White blood cells and proteins, digital illustration. — Stock Photo
    White blood cells and proteins, digital illustration.
    White blood cells, digital illustration. — Stock Photo
    White blood cells, digital illustration.
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is blue. Mitochondria (cyan)) in the cell's cytoplasm produce energy for the cell. Lysosomes (red) contain enzymes for digesting foreign particles. M — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is blue. Mitochondria (cyan)) in the cell's cytoplasm produce energy for the cell. Lysosomes (red) contain enzymes for digesting foreign particles. M
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Activated blood cell fragments platelets, coloured scanning electron micrograph. — Stock Photo
    Activated blood cell fragments platelets, coloured scanning electron micrograph.
    3d illustration showing increase of non-functional white blood cells in leukaemia. — Stock Photo
    3d illustration showing increase of non-functional white blood cells in leukaemia.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Lymphocyte, monocyte and neutrophil white blood cells in blood smear, digital illustration. — Stock Photo
    Lymphocyte, monocyte and neutrophil white blood cells in blood smear, digital illustration.