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    Zika virus particles transmitted by mosquito bite, digital illustration. — Stock Photo
    Zika virus particles transmitted by mosquito bite, digital illustration.
    Bile duct cellular sctructure — Stock Photo
    Bile duct cellular sctructure
    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
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Coloured scanning electron micrograph (SEM) of epithelial cells lining the human trachea (windpipe). — Stock Photo
    Coloured scanning electron micrograph (SEM) of epithelial cells lining the human trachea (windpipe).
    Animal Cells in culture — Stock Photo
    Animal Cells in culture
    Hair follicles of human skin — Stock Photo
    Hair follicles of human skin
    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 embryonic stem cells, digital illustration. — Stock Photo
    Human embryonic stem cells, digital illustration.
    Epithelium of a foliate papillae of the tongue — Stock Photo
    Epithelium of a foliate papillae of the tongue
    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.
    Embryonic stem cells — Stock Photo
    Embryonic stem cells
    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.
    Light micrograph of an artery vascular cross section. — Stock Photo
    Light micrograph of an artery vascular cross section.
    Illustration of human sperm on black background. — Stock Photo
    Illustration of human sperm on black background.
    Human embryo cells, scientific medical illustration. — Stock Photo
    Human embryo cells, scientific medical illustration.
    Illustration of human nervous receptors on white background. — Stock Photo
    Illustration of human nervous receptors on white background.
    Coloured scanning electron micrograph of bacteria cultured from mobile phone. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from mobile phone.
    Cannabis plant. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) plant. The pointed hairs are called lithocyst cells. They contain cystoliths (calcium carbonate crystals) — Stock Photo
    Cannabis plant. Coloured scanning electron micrograph (SEM) of the surface of a cannabis (Cannabis sativa) plant. The pointed hairs are called lithocyst cells. They contain cystoliths (calcium carbonate crystals)
    Human brain with close-up view of neurons, computer illustration. — Stock Photo
    Human brain with close-up view of neurons, computer illustration.
    Cancer cell morphology — Stock Photo
    Cancer cell morphology
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Acanthocystis. Coloured scanning electron micrograph (SEM) of a centrohelid heliozoan with tangential plate-scales and radial spines — Stock Photo
    Acanthocystis. Coloured scanning electron micrograph (SEM) of a centrohelid heliozoan with tangential plate-scales and radial spines
    Computer illustration of bacteria on the surface of intestinal villi — Stock Photo
    Computer illustration of bacteria on the surface of intestinal villi
    Conceptual illustration showing virus infecting neurons of brain. — Stock Photo
    Conceptual illustration showing virus infecting neurons of brain.
    Nerve cells and intercellular junctions — Stock Photo
    Nerve cells and intercellular junctions
    Macrophage foam cells with lipid droplets, digital illustration. — Stock Photo
    Macrophage foam cells with lipid droplets, digital illustration.
    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.
    Illustration of Klebsiella pneumoniae bacteria. K. pneumoniae are Gram-negative, encapsulated, non-motile, enteric, rod-shaped bacteria. This species causes Friedlander's pneumonia and urinary tract infections — Stock Photo
    Illustration of Klebsiella pneumoniae bacteria. K. pneumoniae are Gram-negative, encapsulated, non-motile, enteric, rod-shaped bacteria. This species causes Friedlander's pneumonia and urinary tract infections
    Bacteria cells orange on white background, illustration. — Stock Photo
    Bacteria cells orange on white background, illustration.
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Puffball fungus spore — Stock Photo
    Puffball fungus spore
    Digital illustration of virus particles on black background. — Stock Photo
    Digital illustration of virus particles on black background.
    Blue cancer cells, digital illustration. — Stock Photo
    Blue cancer cells, digital illustration.
    Abstract group of particles of viruses, computer illustration. — Stock Photo
    Abstract group of particles of viruses, computer illustration.
    Illustration of purple chloride channels in cell membrane. — Stock Photo
    Illustration of purple chloride channels in cell membrane.
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Thyroid cancer cells, illustration. — Stock Photo
    Thyroid cancer cells, illustration.
    Bacterial cells on tissue surface — Stock Photo
    Bacterial cells on tissue surface
    Illustration of several of the antibiotic resistance mechanisms of bacteria — Stock Photo
    Illustration of several of the antibiotic resistance mechanisms of bacteria
    Cell cultures under microscope in laboratory. — Stock Photo
    Cell cultures under microscope in laboratory.
    Human hair with dandruff, coloured scanning electron micrograph (SEM). — Stock Photo
    Human hair with dandruff, coloured scanning electron micrograph (SEM).
    Adipocyte fat cell — Stock Photo
    Adipocyte fat cell
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple. — Stock Photo
    Digital illustration of eosinophil white blood cells with lobed nuclei colored in purple.
    Scientist viewing sample on glass slide under light microscope. — Stock Photo
    Scientist viewing sample on glass slide under light microscope.
    Human embryonic stem cells in Petri dish, digital illustration. — Stock Photo
    Human embryonic stem cells in Petri dish, digital illustration.
    Illustration of purple chloride channels in cell membrane. — Stock Photo
    Illustration of purple chloride channels in cell membrane.
    Artery partially blocked by atheroma — Stock Photo
    Artery partially blocked by atheroma
    Bloodstream showing red blood cells — Stock Photo
    Bloodstream showing red blood cells
    Human cytomegalovirus particles in blood flow, digital illustration. — Stock Photo
    Human cytomegalovirus particles in blood flow, digital illustration.
    Digital artwork of human cells with cytomegalic inclusion disease symptom of cytomegalovirus infection. — Stock Photo
    Digital artwork of human cells with cytomegalic inclusion disease symptom of cytomegalovirus infection.
    Immunodeficiency virus infection in blood stream — Stock Photo
    Immunodeficiency virus infection in blood stream
    Red blood cells — Stock Photo
    Red blood cells
    Illustration of illuminated cancer cell on black background. — Stock Photo
    Illustration of illuminated cancer cell on black background.
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells.
    Abstract structure of neural network on dark background, digital illustration. — Stock Photo
    Abstract structure of neural network on dark background, digital 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
    Peripheral nerve. Black and white transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin (dark rings) is an insulating fatty layer that surrounds the myelinated nerve fibres — Stock Photo
    Peripheral nerve. Black and white transmission electron micrograph (TEM) of a section through a small peripheral nerve. Myelin (dark rings) is an insulating fatty layer that surrounds the myelinated nerve fibres