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    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample. — Stock Photo
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample.
    Illustration of single human blood cell on white background. — Stock Photo
    Illustration of single human blood cell on white background.
    Neutrophil cells aggregating at site of infection — Stock Photo
    Neutrophil cells aggregating at site of infection
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Red blood cells on white background, digital illustration. — Stock Photo
    Red blood cells on white background, digital illustration.
    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.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    3d illustration of red blood cell erythrocyte, white blood cell leukocyte and platelet thrombocyte. — Stock Photo
    3d illustration of red blood cell erythrocyte, white blood cell leukocyte and platelet thrombocyte.
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    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.
    Red blood cells and blood vessel — Stock Photo
    Red blood cells and blood vessel
    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.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    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.
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Pathogenic bacteria in the blood stream — Stock Photo
    Pathogenic bacteria in the blood stream
    Red blood cells and blood vessel — Stock Photo
    Red blood cells and blood vessel
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    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.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Red blood cells and leukocytes in cross-section of blood vessel, digital illustration. — Stock Photo
    Red blood cells and leukocytes in cross-section of blood vessel, digital illustration.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Lymphocyte white blood cell in human lymphatic system, digital illustration. — Stock Photo
    Lymphocyte white blood cell in human lymphatic system, digital illustration.
    Nanomachines working on red blood cells, digital illustration. — Stock Photo
    Nanomachines working on red blood cells, digital illustration.
    Erythrocytes red blood cells in human blood vessel, digital illustration. — Stock Photo
    Erythrocytes red blood cells in human blood vessel, digital illustration.
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoan Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    White blood cells with red blood cells, computer illustration. — Stock Photo
    White blood cells with red blood cells, computer illustration.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Basophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Basophil white blood cell and red blood cells, digital illustration.
    HIV human immunodeficiency virus in bloodstream, digital illustration — Stock Photo
    HIV human immunodeficiency virus in bloodstream, digital illustration
    Bacteria and viruses in human artery, digital illustration. — Stock Photo
    Bacteria and viruses in human artery, digital illustration.
    Red blood cells in bloodstream — Stock Photo
    Red blood cells in bloodstream
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    3d illustration of red blood cells erythrocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes.
    Human papillomavirus particles in the bloodstream — Stock Photo
    Human papillomavirus particles in the bloodstream
    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.
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Monocyte and lymphocyte white blood cells in blood smear, digital illustration.
    Nanorobot on red blood cell — Stock Photo
    Nanorobot on red blood cell
    Human nerve structure in cross section, digital illustration. — Stock Photo
    Human nerve structure in cross section, digital illustration.
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Lymphocyte white blood cells in human lymphatic system, digital illustration. — Stock Photo
    Lymphocyte white blood cells in human lymphatic system, digital illustration.
    Activated platelet from peripheral blood — Stock Photo
    Activated platelet from peripheral blood
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Digital illustration of hypochromic and microcytic red blood cells while iron deficiency anaemia. — Stock Photo
    Digital illustration of hypochromic and microcytic red blood cells while iron deficiency anaemia.
    Coloured scanning electron micrograph (SEM) of human myeloid white blood cells found in bone marrow. — Stock Photo
    Coloured scanning electron micrograph (SEM) of human myeloid white blood cells found in bone marrow.
    Bacterial infection in the blood stream — Stock Photo
    Bacterial infection in the blood stream
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    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.
    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.
    Neutrophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Neutrophil white blood cell and red blood cells, digital illustration.
    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.