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    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Cells attacked by virus — Stock Photo
    Cells attacked by virus
    Densovirus virus particles in the bloodstream — Stock Photo
    Densovirus virus particles in the bloodstream
    Coronavirus particles infecting a human cell, computer illustration — Stock Photo
    Coronavirus particles infecting a human cell, computer illustration
    Stages of autophagy mechanism — Stock Photo
    Stages of autophagy mechanism
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Axon connections between cells — Stock Photo
    Axon connections between cells
    Fungal cells revealing sporangium with spores — Stock Photo
    Fungal cells revealing sporangium with spores
    Bacterial encephalitis. Conceptual computer illustration showing bacteria infecting brain cells — Stock Photo
    Bacterial encephalitis. Conceptual computer illustration showing bacteria infecting brain cells
    Stomach cancer cell, computer illustration — Stock Photo
    Stomach cancer cell, computer illustration
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells. — Stock Photo
    Coloured scanning electron micrograph of dividing Schizosaccharomyces pombe yeast cells.
    Pancreatic islet cells. Colored transmission electron micrograph (TEM) of a section through pancreas tissue, showing cells known as Islets of Langerhans. These cells occur in distinct ovoid clusters numbering about 1 million in humans — Stock Photo
    Pancreatic islet cells. Colored transmission electron micrograph (TEM) of a section through pancreas tissue, showing cells known as Islets of Langerhans. These cells occur in distinct ovoid clusters numbering about 1 million in humans
    Red blood cells in the bloodstream — Stock Photo
    Red blood cells in the bloodstream
    Sperm cell, or spermatozoa — Stock Photo
    Sperm cell, or spermatozoa
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain. — Stock Photo
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain.
    Light micrograph (LM) of a section through the fingertip. — Stock Photo
    Light micrograph (LM) of a section through the fingertip.
    Active CAR T-cells cancer immunotherapy, medical illustration. — Stock Photo
    Active CAR T-cells cancer immunotherapy, medical illustration.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Human cytomegalovirus particles in blood flow, digital illustration. — Stock Photo
    Human cytomegalovirus particles in blood flow, digital illustration.
    Human blood, computer illustration — Stock Photo
    Human blood, computer illustration
    Unicellular fungus Candida auris — Stock Photo
    Unicellular fungus Candida auris
    Liver tissue, light micrograph. Animal tissue. — Stock Photo
    Liver tissue, light micrograph. Animal tissue.
    Computer illustration of unicellular yeast fungus Candida auris. — Stock Photo
    Computer illustration of unicellular yeast fungus Candida auris.
    Measles virus particles budding from cells, digital illustration. — Stock Photo
    Measles virus particles budding from cells, digital illustration.
    Digital illustration of human cells on blue background. — Stock Photo
    Digital illustration of human cells on blue background.
    Broom pollen grain — Stock Photo
    Broom pollen grain
    Neutrophil white blood cell in blood, digital artwork. — Stock Photo
    Neutrophil white blood cell in blood, digital artwork.
    Red blood cells in blood vessel, digital illustration. — Stock Photo
    Red blood cells in blood vessel, digital illustration.
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut — Stock Photo
    Crypts of Lieberkuhn. Light micrograph (LM). Crypts of Lieberkuhn of the colon shown in cross section. Crypts are long blind-ending tube-like extensions of the surface epithelial lining of the gut
    Human brain cells — Stock Photo
    Human brain cells
    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
    3d illustration of cross section of hair follicle with description. — Stock Photo
    3d illustration of cross section of hair follicle with description.
    HIV human immunodeficiency virus in bloodstream, digital illustration — Stock Photo
    HIV human immunodeficiency virus in bloodstream, digital illustration
    Human brain with highlighted pons and neurons, illustration. Human brain with highlighted pons Varolii and close-up view of pyramidal neurons (nerve cells) located in pons — Stock Photo
    Human brain with highlighted pons and neurons, illustration. Human brain with highlighted pons Varolii and close-up view of pyramidal neurons (nerve cells) located in pons
    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
    Cancer cells and white blood cells — Stock Photo
    Cancer cells and white blood cells
    Illustration of clot of human blood cells. — Stock Photo
    Illustration of clot of human blood cells.
    Zika virus particles transmitted by mosquito bite, digital illustration. — Stock Photo
    Zika virus particles transmitted by mosquito bite, digital illustration.
    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
    Nerves synapse, biological digital illustration. — Stock Photo
    Nerves synapse, biological digital illustration.
    White blood cells, digital illustration. — Stock Photo
    White blood cells, digital illustration.
    Cancer cell being attacked by leukocytes, computer illustration — Stock Photo
    Cancer cell being attacked by leukocytes, computer illustration
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    3d illustration of red rod-shaped bacteria. — Stock Photo
    3d illustration of red rod-shaped bacteria.
    Malaria infection infecting red blood cells, digital illustration. — Stock Photo
    Malaria infection infecting red blood cells, digital illustration.
    Zika virus particles transmitted by mosquito bite, digital illustration. — Stock Photo
    Zika virus particles transmitted by mosquito bite, digital illustration.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Intestinal villi, computer illustration — Stock Photo
    Intestinal villi, computer illustration
    Pyramidal neurons (nerve cells) of human brain frontal cortex, computer illustration — Stock Photo
    Pyramidal neurons (nerve cells) of human brain frontal cortex, computer illustration
    Christmas cactus pollen — Stock Photo
    Christmas cactus pollen
    Fatcells structure and anatomy — Stock Photo
    Fatcells structure and anatomy
    Various bacteria in human intestine, digital illustration. — Stock Photo
    Various bacteria in human intestine, digital illustration.
    Abstract group of particles of viruses, computer illustration. — Stock Photo
    Abstract group of particles of viruses, computer illustration.
    Human blood cells, computer illustration — Stock Photo
    Human blood cells, computer illustration
    Human smooth muscle, light micrograph. — Stock Photo
    Human smooth muscle, light micrograph.
    Abstract illustration of white bacilli bacteria, full frame. — Stock Photo
    Abstract illustration of white bacilli bacteria, full frame.
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    Dark spheres on black background, digital illustration. — Stock Photo
    Dark spheres on black background, digital illustration.
    Magnified digital illustration of Candida albicans yeast. — Stock Photo
    Magnified digital illustration of Candida albicans yeast.