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    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    Lassa virus particles, digital illustration. — Stock Photo
    Lassa virus particles, digital illustration.
    Abstract blood vessel with white and red blood cells, digital illustration. — Stock Photo
    Abstract blood vessel with white and red blood cells, digital illustration.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Bacteria from a coin. Coloured scanning electron micrograph (SEM) of bacteria cultured from a english one pound coin — Stock Photo
    Bacteria from a coin. Coloured scanning electron micrograph (SEM) of bacteria cultured from a english one pound coin
    Plant cells, 3d illustration — Stock Photo
    Plant cells, 3d illustration
    Electric vehicle charging, illustration. — Stock Photo
    Electric vehicle charging, illustration.
    Modern solar panels reflecting bright rays against cloudless blue sky on sunny day on photovoltaic power station — Stock Photo
    Modern solar panels reflecting bright rays against cloudless blue sky on sunny day on photovoltaic power station
    Parasites attacking spermatozoons fertilizing egg cell. — Stock Photo
    Parasites attacking spermatozoons fertilizing egg cell.
    Virus particles spreading through blood stream — Stock Photo
    Virus particles spreading through blood stream
    Daisy pollen grain — Stock Photo
    Daisy pollen grain
    Sperm cells, abstract digital illustration. — Stock Photo
    Sperm cells, abstract digital illustration.
    Illustration of human skin anatomy on white background. — Stock Photo
    Illustration of human skin anatomy on white background.
    Balamuthia mandrillaris amoeba organisms, digital illustration. — Stock Photo
    Balamuthia mandrillaris amoeba organisms, digital illustration.
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Male scientist using computer. — Stock Photo
    Male scientist using computer.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    Protein molecules, 3d illustration — Stock Photo
    Protein molecules, 3d illustration
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    Nanoparticles in blood — Stock Photo
    Nanoparticles in blood
    Sperm cells in seminiferous tubules — Stock Photo
    Sperm cells in seminiferous tubules
    Human brain with connections showing activity, conceptual illustration. — Stock Photo
    Human brain with connections showing activity, conceptual illustration.
    Cell infected with pathogenic Chlamydia bacteria, 3d illustration. — Stock Photo
    Cell infected with pathogenic Chlamydia bacteria, 3d illustration.
    Illustration of platelets (thrombocytes) that have been activated (with extensions) and those that are non-activated. Platelets are part of the blood. When a blood vessel is damaged, the platelets become activated and secrete chemicals that cause the — Stock Photo
    Illustration of platelets (thrombocytes) that have been activated (with extensions) and those that are non-activated. Platelets are part of the blood. When a blood vessel is damaged, the platelets become activated and secrete chemicals that cause the
    Secondary liver cancer — Stock Photo
    Secondary liver cancer
    Illustration of abnormal red blood cells known as spur cells acanthocytes. — Stock Photo
    Illustration of abnormal red blood cells known as spur cells acanthocytes.
    Normal White blood cell — Stock Photo
    Normal White blood cell
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    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.
    Red blood cells flowing inside an artery — Stock Photo
    Red blood cells flowing inside an artery
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Hyaline cartilage, a semi-rigid connective tissue — Stock Photo
    Hyaline cartilage, a semi-rigid connective tissue
    Cancer cell and T cells — Stock Photo
    Cancer cell and T cells
    Digital artwork of round transparent cells on white background. — Stock Photo
    Digital artwork of round transparent cells on white background.
    Abstract green colored cancer cells on tissue, digital illustration. — Stock Photo
    Abstract green colored cancer cells on tissue, digital illustration.
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia. — Stock Photo
    Colored illustration showing abundant lymphoblast cells in human bone marrow smear in acute lymphoblastic leukaemia.
    Cancer cell and T cells — Stock Photo
    Cancer cell and T cells
    Normal sperm cells — Stock Photo
    Normal sperm cells
    Blood clot or thrombus — Stock Photo
    Blood clot or thrombus
    Red blood cells, computer illustration — Stock Photo
    Red blood cells, computer illustration
    Visual rendering of Cells — Stock Photo
    Visual rendering of Cells
    T-cell attached to cancer cell — Stock Photo
    T-cell attached to cancer cell
    Normal sperm cells — Stock Photo
    Normal sperm cells
    Conceptual image of a neuron on black background — Stock Photo
    Conceptual image of a neuron on black background
    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.
    Digital illustration of virus particles on plain background. — Stock Photo
    Digital illustration of virus particles on plain background.
    Cancer invasion into surrounding tissues, conceptual computer illustration. — Stock Photo
    Cancer invasion into surrounding tissues, conceptual computer illustration.
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Relation of thyroid and pituitary gland — Stock Photo
    Relation of thyroid and pituitary gland
    Illustration of motor protein cellular structure. — Stock Photo
    Illustration of motor protein cellular structure.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Immune system T-lymphocytes cells binding antigen, digital illustration. — Stock Photo
    Immune system T-lymphocytes cells binding antigen, digital illustration.
    Hepatocyte cells, light micrograph. Hepatocyte cells are the main parenchymal tissue cells of the liver. Haematoxylin and eosin stain. — Stock Photo
    Hepatocyte cells, light micrograph. Hepatocyte cells are the main parenchymal tissue cells of the liver. Haematoxylin and eosin stain.
    Laboratory worker pipetting liquid into microcentrifuge tube. — Stock Photo
    Laboratory worker pipetting liquid into microcentrifuge tube.
    Neural network showing synaptic terminals — Stock Photo
    Neural network showing synaptic terminals
    Zebrafish young. Coloured scanning electron micrograph (SEM) of newly-hatched zebrafish (Danio rerio) young or fry. These fish are used to study embryonic development. The eyes (blue) are seen in the heads. Zebrafish eggs are transparent — Stock Photo
    Zebrafish young. Coloured scanning electron micrograph (SEM) of newly-hatched zebrafish (Danio rerio) young or fry. These fish are used to study embryonic development. The eyes (blue) are seen in the heads. Zebrafish eggs are transparent
    Coloured scanning electron micrograph of bacteria cultured from mobile phone surface. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from mobile phone surface.
    Colored scanning electron micrograph of starch grains in seed of legume. — Stock Photo
    Colored scanning electron micrograph of starch grains in seed of legume.