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    Illustration of lipid blood clot in circulatory system. — Stock Photo
    Illustration of lipid blood clot in circulatory system.
    Fertilization of human egg — Stock Photo
    Fertilization of human egg
    Human hip bone structure — Stock Photo
    Human hip bone structure
    Light micrograph of a section through the surface of a tonsil showing the stratified squamous epithelium (pink) and underlying lymphoid tissue. — Stock Photo
    Light micrograph of a section through the surface of a tonsil showing the stratified squamous epithelium (pink) and underlying lymphoid tissue.
    Fertilization of healthy human egg — Stock Photo
    Fertilization of healthy human egg
    Zika virus particle, computer illustration. — Stock Photo
    Zika virus particle, computer illustration.
    Human embryonic stem cells, digital illustration. — Stock Photo
    Human embryonic stem cells, digital illustration.
    Conceptual digital illustration of medical nanorobot attacking cancerous cell. — Stock Photo
    Conceptual digital illustration of medical nanorobot attacking cancerous cell.
    Magnified digital illustration of human cell cross-section. — Stock Photo
    Magnified digital illustration of human cell cross-section.
    Helicobacter pyloris bacteria — Stock Photo
    Helicobacter pyloris bacteria
    Digital illustration of multiple threadworms in human intestine. — Stock Photo
    Digital illustration of multiple threadworms in human intestine.
    3d illustration of egg cell frozen into ice cube. — Stock Photo
    3d illustration of egg cell frozen into ice cube.
    Human skeletal system — Stock Photo
    Human skeletal system
    Multi-colored rod-shaped soil bacteria, conceptual illustration. — Stock Photo
    Multi-colored rod-shaped soil bacteria, conceptual illustration.
    Piece of cake and microscopic image of Salmonella bacteria, conceptual illustration. — Stock Photo
    Piece of cake and microscopic image of Salmonella bacteria, conceptual illustration.
    Digital illustration of blue bacteria in bloodstream. — Stock Photo
    Digital illustration of blue bacteria in bloodstream.
    Cholesterol plaque leading to atherosclerosis — Stock Photo
    Cholesterol plaque leading to atherosclerosis
    Bacteria infecting organism — Stock Photo
    Bacteria infecting organism
    Illustration of single human blood cell on white background. — Stock Photo
    Illustration of single human blood cell on white background.
    Cholera bacteria colony — Stock Photo
    Cholera bacteria colony
    Adult Locust on white background — Stock Photo
    Adult Locust on white background
    Illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Illustration of cancer cell being attacked by white blood cells.
    View of Fetus at 14 weeks — Stock Photo
    View of Fetus at 14 weeks
    Human eyelash mites — Stock Photo
    Human eyelash mites
    Blue cells on black background, digital illustration. — Stock Photo
    Blue cells on black background, digital illustration.
    Human sperm and egg — Stock Photo
    Human sperm and egg
    Digital 3d illustration of growing mildew fungi. — Stock Photo
    Digital 3d illustration of growing mildew fungi.
    Coloured X-ray of a 16 year old male with a fractured clavicle (collar bone). — Stock Photo
    Coloured X-ray of a 16 year old male with a fractured clavicle (collar bone).
    3d illustration of antibodies attacking virus particles. — Stock Photo
    3d illustration of antibodies attacking virus particles.
    Human esophagus and stomach, illustration. — Stock Photo
    Human esophagus and stomach, illustration.
    View of Fetus at 28 weeks — Stock Photo
    View of Fetus at 28 weeks
    Red cancer cells, digital illustration. — Stock Photo
    Red cancer cells, digital illustration.
    Space craft vehicles in cloudy sky, illustration. — Stock Photo
    Space craft vehicles in cloudy sky, illustration.
    Components of house dust — Stock Photo
    Components of house dust
    Foreign body in finger — Stock Photo
    Foreign body in finger
    Nanobot attacking virus, conceptual digital illustration. — Stock Photo
    Nanobot attacking virus, conceptual digital illustration.
    Erythrocyte red blood cell, digital illustration. — Stock Photo
    Erythrocyte red blood cell, digital illustration.
    Magnified digital illustration of macrophage cell. — Stock Photo
    Magnified digital illustration of macrophage cell.
    Medical nanorobot in human blood vessel, panoramic digital illustration. — Stock Photo
    Medical nanorobot in human blood vessel, panoramic digital illustration.
    View of Fetus at 13 weeks — Stock Photo
    View of Fetus at 13 weeks
    Red blood cells — Stock Photo
    Red blood cells
    Human thyroid gland — Stock Photo
    Human thyroid gland
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Digital illustration of fungal morphology of filamentous allergenic fungus Alternaria alternata and photograph of fungal colonies on Sabouraud Dextrose Agar. — Stock Photo
    Digital illustration of fungal morphology of filamentous allergenic fungus Alternaria alternata and photograph of fungal colonies on Sabouraud Dextrose Agar.
    Viral particle infection blood stream — Stock Photo
    Viral particle infection blood stream
    Digital artwork of Voyager probe at Oort cloud. — Stock Photo
    Digital artwork of Voyager probe at Oort cloud.
    Adult head louse — Stock Photo
    Adult head louse
    Earth and the Sun — Stock Photo
    Earth and the Sun
    Close-up of parasitic amoeba in human intestine, digital artwork. — Stock Photo
    Close-up of parasitic amoeba in human intestine, digital artwork.
    Adult scabies mite — Stock Photo
    Adult scabies mite
    Digital illustration of fungal morphology of filamentous allergenic fungus Alternaria alternata and photograph of fungal colonies on Sabouraud Dextrose Agar. — Stock Photo
    Digital illustration of fungal morphology of filamentous allergenic fungus Alternaria alternata and photograph of fungal colonies on Sabouraud Dextrose Agar.
    Bacillus anthracis bacteria — Stock Photo
    Bacillus anthracis bacteria
    Digital illustration of shaped virus cells. — Stock Photo
    Digital illustration of shaped virus cells.
    Skeletal system of adult female — Stock Photo
    Skeletal system of adult female
    Human embryonic stem cell, digital illustration. — Stock Photo
    Human embryonic stem cell, digital illustration.
    3d illustration of cancer cell attacked and killed by lymphocytes. — Stock Photo
    3d illustration of cancer cell attacked and killed by lymphocytes.
    Digital illustration of human digestive system with highlighted pancreas. — Stock Photo
    Digital illustration of human digestive system with highlighted pancreas.
    Swallowed coins in the oesophagus — Stock Photo
    Swallowed coins in the oesophagus
    Magnified digital illustration of morula cells. — Stock Photo
    Magnified digital illustration of morula cells.
    Illustration of jets emanating from poles of young star with circumstellar disc of dust. — Stock Photo
    Illustration of jets emanating from poles of young star with circumstellar disc of dust.