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    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil blood cells.
    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
    Spreading cancer cells, computer illustration. — Stock Photo
    Spreading cancer cells, computer illustration.
    3d digital illustration of narrowed blood vessel. — Stock Photo
    3d digital illustration of narrowed blood vessel.
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Illustration of eosinophil white blood cell with purple lobed nuclei. — Stock Photo
    Illustration of eosinophil white blood cell with purple lobed nuclei.
    Bacterial blood infection, digital illustration. — Stock Photo
    Bacterial blood infection, digital illustration.
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration. — Stock Photo
    Blood cells and Plasmodium sp. parasites (at schizont stage) causing malaria, computer illustration.
    Antibody blocking programmed cell death, illustration. — Stock Photo
    Antibody blocking programmed cell death, illustration.
    Illustration of cross section of human skin with hair follicle and blood vessels. — Stock Photo
    Illustration of cross section of human skin with hair follicle and blood vessels.
    Healthy red and white blood cells — Stock Photo
    Healthy red and white blood cells
    Illustration of human blood cells flowing through blood vessel. — Stock Photo
    Illustration of human blood cells flowing through blood vessel.
    Illustration of blue liquid injected into bloodstream with syringe seen from inside with blood and green virus cells. — Stock Photo
    Illustration of blue liquid injected into bloodstream with syringe seen from inside with blood and green virus cells.
    Plasmodium vivax protozoan inside red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoan inside red blood cells, digital illustration.
    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.
    Round red cells on plain background, digital illustration. — Stock Photo
    Round red cells on plain background, digital illustration.
    Rotavirus virus particles in the bloodstream — Stock Photo
    Rotavirus virus particles in the bloodstream
    Conceptual digital illustration of horseshoe crab blood in blue color containing haemocyanin and amoebocytes. — Stock Photo
    Conceptual digital illustration of horseshoe crab blood in blue color containing haemocyanin and amoebocytes.
    Human red blood cells — Stock Photo
    Human red blood cells
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Red blood cells, computer illustration — Stock Photo
    Red blood cells, computer illustration
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Digital illustration showing red blood cells, platelets, neutrophils, monocyte and lymphocytes in normal blood smear. — Stock Photo
    Digital illustration showing red blood cells, platelets, neutrophils, monocyte and lymphocytes in normal blood smear.
    Red blood cells — Stock Photo
    Red blood cells
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    3d illustration of red blood cells erythrocytes, white blood cells leukocytes and platelets thrombocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes, white blood cells leukocytes and platelets thrombocytes.
    Rotavirus virus particles in the bloodstream — Stock Photo
    Rotavirus virus particles in the bloodstream
    Red blood cells in blood stream — Stock Photo
    Red blood cells in blood stream
    Red blood cells and blood vessel — Stock Photo
    Red blood cells and blood vessel
    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.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Antibodies (y-shaped) responding to an infection with the new coronavirus SARS-CoV-2 and destruction of the virus, conceptual illustration — Stock Photo
    Antibodies (y-shaped) responding to an infection with the new coronavirus SARS-CoV-2 and destruction of the virus, conceptual illustration
    3d illustration of red blood cells erythrocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes.
    Digital illustration of trypanosome protozoan parasites in blood causing sleeping sickness transmitted by blood. — Stock Photo
    Digital illustration of trypanosome protozoan parasites in blood causing sleeping sickness transmitted by blood.
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Blood clot formed by red blood cells — Stock Photo
    Blood clot formed by red blood cells
    White blood cells, digital illustration. — Stock Photo
    White 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.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    3d illustration of lymphocytes attacking cancer cells in human body. — Stock Photo
    3d illustration of lymphocytes attacking cancer cells in human body.
    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.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Basophil white blood cell and red blood cells, digital illustration. — Stock Photo
    Basophil white blood cell and red blood cells, digital illustration.
    Activated platelets in a blood smear with red blood cells, illustration. — Stock Photo
    Activated platelets in a blood smear with red blood cells, illustration.
    Red blood cells — Stock Photo
    Red blood cells
    Colored scanning electron micrograph of red blood cells. — Stock Photo
    Colored scanning electron micrograph of red blood cells.
    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.
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    Digital illustration of abnormal white blood cells B-lymphocytes while hairy cell leukaemia. — Stock Photo
    Digital illustration of abnormal white blood cells B-lymphocytes while hairy cell leukaemia.
    Lymphocytes white blood cells, digital illustration. — Stock Photo
    Lymphocytes white blood cells, digital illustration.
    Lymphocytes attacking viruses — Stock Photo
    Lymphocytes attacking viruses
    B-lymphocyte cells, computer illustration — Stock Photo
    B-lymphocyte cells, computer illustration
    Illustration of HIV virus particles in human blood. — Stock Photo
    Illustration of HIV virus particles in human blood.
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration
    Plasmodium vivax protozoa inside blood vessel, digital illustration. — Stock Photo
    Plasmodium vivax protozoa inside blood vessel, digital illustration.