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    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Normal White blood cell — Stock Photo
    Normal White blood cell
    Measles virus particles budding from cells, digital illustration. — Stock Photo
    Measles virus particles budding from cells, digital illustration.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Human red blood cells — Stock Photo
    Human red blood cells
    Illustration of clot of human blood cells. — Stock Photo
    Illustration of clot of human blood cells.
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Nanobot in bloodstream with red erythrocytes, digital illustration. — Stock Photo
    Nanobot in bloodstream with red erythrocytes, digital 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.
    Illustration of human blood cells in blood stream. — Stock Photo
    Illustration of human blood cells in blood stream.
    White blood cell — Stock Photo
    White blood cell
    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.
    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.
    3d illustration of red blood cells erythrocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes.
    Swine influenza virus microscopic view — Stock Photo
    Swine influenza virus microscopic view
    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.
    Red blood cells in the bloodstream — Stock Photo
    Red blood cells in the bloodstream
    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.
    Human artery showing artery walls and bloodstream — Stock Photo
    Human artery showing artery walls and bloodstream
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red). — Stock Photo
    Coloured scanning electron micrograph (SEM) of a section through a vein in the liver, which is filled with red blood cells (erythrocytes, red).
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Illustration of group of cells in blood clot. — Stock Photo
    Illustration of group of cells in blood clot.
    Close-up of hand of cell biologist holding flask of stem cells cultivated in red growth medium. — Stock Photo
    Close-up of hand of cell biologist holding flask of stem cells cultivated in red growth medium.
    Immune response to cancer — Stock Photo
    Immune response to cancer
    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.
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Fat in blood cells blocking blood vessel, digital illustration. — Stock Photo
    Fat in blood cells blocking blood vessel, digital illustration.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Used surgical swab — Stock Photo
    Used surgical swab
    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.
    Bone marrow cellular structure — Stock Photo
    Bone marrow cellular structure
    Dead, dying and healthy red blood cells, conceptual digital illustration. — Stock Photo
    Dead, dying and healthy red blood cells, conceptual digital illustration.
    Trypanosoma brucei protozoan — Stock Photo
    Trypanosoma brucei protozoan
    Digital illustration of trypanosome parasite in blood causing Chagas disease. — Stock Photo
    Digital illustration of trypanosome parasite in blood causing Chagas disease.
    Human blood, computer illustration — Stock Photo
    Human blood, computer illustration
    3d illustration of virus particles with receptors on red background. — Stock Photo
    3d illustration of virus particles with receptors on red background.
    Human blood cells — Stock Photo
    Human blood cells
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Blood cells, light micrograph. — Stock Photo
    Blood cells, light micrograph.
    Scanning electron microscopy of DNA molecules and red and white blood cells. — Stock Photo
    Scanning electron microscopy of DNA molecules and red and white blood cells.
    Red and white blood cells — Stock Photo
    Red and white blood cells
    Trypanosoma brucei protozoan — Stock Photo
    Trypanosoma brucei protozoan
    Plasmodium vivax protozoan inside red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoan inside red blood cells, digital illustration.
    Human blood cells — Stock Photo
    Human blood cells
    Plasmodium ovale protozoan inside red blood cells at the ring-form trophozoite stage, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells at the ring-form trophozoite stage, computer illustration
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    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.
    Round red cells on plain background, digital illustration. — Stock Photo
    Round red cells on plain background, digital illustration.
    Illustration of clot of human blood cells. — Stock Photo
    Illustration of clot of human blood cells.
    Human blood, computer illustration — Stock Photo
    Human blood, computer illustration
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    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.
    Trypanosoma brucei protozoan — Stock Photo
    Trypanosoma brucei protozoan
    Streptococcus pneumoniae bacteria, digital illustration. — Stock Photo
    Streptococcus pneumoniae bacteria, digital illustration.
    Red blood cells in a blood vessel — Stock Photo
    Red blood cells in a blood vessel
    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.
    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle