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    Neural network and axons — Stock Photo
    Neural network and axons
    Abstract cancer cells, digital illustration. — Stock Photo
    Abstract cancer cells, digital illustration.
    Duct is lined with pseudostratified epithelium — Stock Photo
    Duct is lined with pseudostratified epithelium
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells — Stock Photo
    Bone cancer cells. Coloured scanning electron micrograph of osteosarcoma cancer cells. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed mesenchymal cells
    Nerve cells and axon structures — Stock Photo
    Nerve cells and axon structures
    Lassa virus particles, digital illustration. — Stock Photo
    Lassa virus particles, digital illustration.
    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.
    Active platelets in human blood with erythrocytes and leukocytes, computer illustration. — Stock Photo
    Active platelets in human blood with erythrocytes and leukocytes, computer illustration.
    Dendritic cells of immune system — Stock Photo
    Dendritic cells of immune system
    Top view of microbes growing on agar plate on plain background. — Stock Photo
    Top view of microbes growing on agar plate on plain background.
    Malaria infection infecting red blood cells, digital illustration. — Stock Photo
    Malaria infection infecting red blood cells, digital illustration.
    Animal cells with mitochondria, digital illustration. — Stock Photo
    Animal cells with mitochondria, digital illustration.
    Cancer cell being attacked by leukocytes, computer illustration — Stock Photo
    Cancer cell being attacked by leukocytes, computer illustration
    Illustration of sperm fertilizing human egg cell. — Stock Photo
    Illustration of sperm fertilizing human egg cell.
    Lysosome fusing with autophagosome — Stock Photo
    Lysosome fusing with autophagosome
    Cells dividing, computer illustration — Stock Photo
    Cells dividing, computer illustration
    Colored scanning electron micrograph of pollen grains from marigold flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from marigold flower.
    Healthy human sperm cells — Stock Photo
    Healthy human sperm cells
    Coronavirus particles infecting a human cell, computer illustration — Stock Photo
    Coronavirus particles infecting a human cell, computer illustration
    CRISPR-Cas9 gene editing complex in DNA and cells, conceptual illustration. — Stock Photo
    CRISPR-Cas9 gene editing complex in DNA and cells, conceptual illustration.
    People walking in prison cells — Stock Photo
    People walking in prison cells
    Closeup of abstract background with round shaped cells of vaccine of different sizes illuminated by colorful light — Stock Photo
    Closeup of abstract background with round shaped cells of vaccine of different sizes illuminated by colorful light
    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
    Relation of thyroid and pituitary gland — Stock Photo
    Relation of thyroid and pituitary gland
    Microbes growing on agar plate on blue background. — Stock Photo
    Microbes growing on agar plate on blue background.
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Digital illustration of pyramidal nerve cells from cerebral cortex of brain. — Stock Photo
    Digital illustration of pyramidal nerve cells from cerebral cortex of brain.
    Protein cluster on plain background, digital illustration. — Stock Photo
    Protein cluster on plain background, digital illustration.
    Cancer invasion into surrounding tissues, conceptual computer illustration. — Stock Photo
    Cancer invasion into surrounding tissues, conceptual computer illustration.
    3d illustration of transparent and colourful protozoa. — Stock Photo
    3d illustration of transparent and colourful protozoa.
    Kidney glomerulus and podocyte cells — Stock Photo
    Kidney glomerulus and podocyte cells
    Neutrophil white blood cell in blood, digital artwork. — Stock Photo
    Neutrophil white blood cell in blood, digital artwork.
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasite and red blood cell in flow, computer illustration.
    Transitional epithelium in urinary bladder, digital illustration. — Stock Photo
    Transitional epithelium in urinary bladder, digital illustration.
    Methicillin-resistant Staphylococcus aureus — Stock Photo
    Methicillin-resistant Staphylococcus aureus
    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
    Illustration of CAR (chimeric antigen receptor) T cell immunotherapy, process that is being developed to treat cancer — Stock Photo
    Illustration of CAR (chimeric antigen receptor) T cell immunotherapy, process that is being developed to treat cancer
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Bacteria amidst blood cells in blood vessel, digital illustration. — Stock Photo
    Bacteria amidst blood cells in blood vessel, digital illustration.
    Female reproductive system — Stock Photo
    Female reproductive system
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Lymphocytes attacking a cancer cell — Stock Photo
    Lymphocytes attacking a cancer cell
    Campylobacter jejuni bacteria with flagella, digital artwork. — Stock Photo
    Campylobacter jejuni bacteria with flagella, digital artwork.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Sperm cell, or spermatozoa — Stock Photo
    Sperm cell, or spermatozoa
    Human brain with close-up view of neurons, computer illustration. — Stock Photo
    Human brain with close-up view of neurons, computer illustration.
    3d illustration of cancer cells attacked and killed by lymphocytes. — Stock Photo
    3d illustration of cancer cells attacked and killed by lymphocytes.
    Bacterial brain infection. Conceptual computer illustration showing Streptococcus pneumoniae bacteria, one of the main causes of bacterial meningitis and meningoencephalitis, infecting brain cells — Stock Photo
    Bacterial brain infection. Conceptual computer illustration showing Streptococcus pneumoniae bacteria, one of the main causes of bacterial meningitis and meningoencephalitis, infecting brain cells
    Measles virus particle, computer illustration. — Stock Photo
    Measles virus particle, computer illustration.
    Digital illustration of Acanthamoeba castellanii amoebas on white background. — Stock Photo
    Digital illustration of Acanthamoeba castellanii amoebas on white background.
    Human immunodeficiency virus infection — Stock Photo
    Human immunodeficiency virus infection
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    3d illustration of blood cells and Plasmodium parasites causing malaria. — Stock Photo
    3d illustration of blood cells and Plasmodium parasites causing malaria.
    Microscopic view of paramecium unicellular ciliates — Stock Photo
    Microscopic view of paramecium unicellular ciliates
    Human bone marrow, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human bone marrow, light micrograph. Haematoxylin and eosin stain.
    Sporangium fungal cell with spores — Stock Photo
    Sporangium fungal cell with spores
    Illustration of skin cross section on white background. — Stock Photo
    Illustration of skin cross section on white background.
    Flu viruses, computer illustration — Stock Photo
    Flu viruses, computer illustration
    Cells undergoing mitosis — Stock Photo
    Cells undergoing mitosis