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    Cells coloured in imaging flow cytometry colours, conceptual digital illustration. — Stock Photo
    Cells coloured in imaging flow cytometry colours, conceptual digital illustration.
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa. — Stock Photo
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa.
    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
    Virus in human blood, computer illustration. — Stock Photo
    Virus in human blood, computer illustration.
    Artery partially blocked by an atheroma — Stock Photo
    Artery partially blocked by an atheroma
    Digital illustration of budding Saccharomyces cerevisiae yeast cells. — Stock Photo
    Digital illustration of budding Saccharomyces cerevisiae yeast cells.
    Human intestine and close-up of Campylobacter jejuni bacteria causing Campylobacteriosis, conceptual illustration. — Stock Photo
    Human intestine and close-up of Campylobacter jejuni bacteria causing Campylobacteriosis, conceptual illustration.
    Illustration of human blood cells in blood stream. — Stock Photo
    Illustration of human blood cells in blood stream.
    Red blood cells and virus particles, computer illustration. — Stock Photo
    Red blood cells and virus particles, computer illustration.
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with cirrhosis-associated hepatocellular nodules. — Stock Photo
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with cirrhosis-associated hepatocellular nodules.
    Digital illustration of human cilia cells. — Stock Photo
    Digital illustration of human cilia cells.
    Red blood cells in the bloodstream — Stock Photo
    Red blood cells in the bloodstream
    Lymphocyte white blood cell in blood smear, digital illustration. — Stock Photo
    Lymphocyte white blood cell in blood smear, digital illustration.
    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.
    Leukaemia blood cells — Stock Photo
    Leukaemia blood cells
    Artwork of cancerous cell — Stock Photo
    Artwork of cancerous cell
    Skin cancer cell, computer illustration. — Stock Photo
    Skin cancer cell, computer illustration.
    Plant cells, 3d illustration — Stock Photo
    Plant cells, 3d illustration
    Tumour tissue cells, digital illustration. — Stock Photo
    Tumour tissue cells, digital illustration.
    Human sperm cells — Stock Photo
    Human sperm cells
    Human intestine and close-up of Campylobacter jejuni bacteria causing Campylobacteriosis, conceptual illustration. — Stock Photo
    Human intestine and close-up of Campylobacter jejuni bacteria causing Campylobacteriosis, conceptual illustration.
    Abutilon sp. pollen grain — Stock Photo
    Abutilon sp. pollen grain
    Pyramidal neurons of human brain cortex, computer illustration — Stock Photo
    Pyramidal neurons of human brain cortex, computer illustration
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is red. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (black) contain enzymes for digesting foreign particles. — Stock Photo
    Macrophage. Coloured transmission electron micrograph (TEM) of a macrophage cell. The cell's nucleus is red. Mitochondria (orange) in the cell's cytoplasm produce energy for the cell. Lysosomes (black) contain enzymes for digesting foreign particles.
    Purple colored Enterococcus bacteria, computer illustration. — Stock Photo
    Purple colored Enterococcus bacteria, computer illustration.
    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 3d colored illustration of cancer cell in process of mitosis. — Stock Photo
    Digital 3d colored illustration of cancer cell in process of mitosis.
    Digital illustration of trypanosome parasite in blood causing Chagas disease. — Stock Photo
    Digital illustration of trypanosome parasite in blood causing Chagas disease.
    Brown Adenovirus particles, colored digital 3d illustration. — Stock Photo
    Brown Adenovirus particles, colored digital 3d illustration.
    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.
    HIV virus particles — Stock Photo
    HIV virus particles
    Blood vessel in the lung — Stock Photo
    Blood vessel in the lung
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver — Stock Photo
    Liver cirrhosis. Computer illustration and light micrograph of a section through a human liver with from primary biliary cirrhosis. Cirrhosis is a disease in which bands of fibrosis (internal scarring) break up the internal structure of the liver
    Illustration of dividing cancer cell on blue background. — Stock Photo
    Illustration of dividing cancer cell on blue background.
    Sperm cell, or spermatozoa — Stock Photo
    Sperm cell, or spermatozoa
    Rotavirus particles infecting human intestine, digital artwork. — Stock Photo
    Rotavirus particles infecting human intestine, digital artwork.
    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.
    Dopaminergic neuron brain cells, digital illustration. — Stock Photo
    Dopaminergic neuron brain cells, digital illustration.
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (red) and jaws. Magnification: x50 when printed 10 centimetres wide. — Stock Photo
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (red) and jaws. Magnification: x50 when printed 10 centimetres wide.
    Lymph node in tuberculosis — Stock Photo
    Lymph node in tuberculosis
    White blood cells and proteins, digital illustration. — Stock Photo
    White blood cells and proteins, 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.
    Digital illustration of trypanosome parasites causing Chagas disease in blood vessel. — Stock Photo
    Digital illustration of trypanosome parasites causing Chagas disease in blood vessel.
    Human Fertilisation, computer illustration — Stock Photo
    Human Fertilisation, computer illustration
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (red) and jaws. Magnification: x50 when printed 10 centimetres wide. — Stock Photo
    Ant head. Coloured scanning electron micrograph (SEM) of the head of an ant (family Formicidae). showing its large compound eyes (red) and jaws. Magnification: x50 when printed 10 centimetres wide.
    Pseudostratified columnar epithelium, digital illustration. — Stock Photo
    Pseudostratified columnar epithelium, digital illustration.
    3d illustration of transparent and colourful protozoa. — Stock Photo
    3d illustration of transparent and colourful protozoa.
    Plasmodium vivax protozoa inside blood vessel, digital illustration. — Stock Photo
    Plasmodium vivax protozoa inside blood vessel, digital illustration.
    Plasmodium vivax protozoa inside blood vessel, digital illustration. — Stock Photo
    Plasmodium vivax protozoa inside blood vessel, digital illustration.
    Green coli bacteria on plain background, digital illustration. — Stock Photo
    Green coli bacteria on plain background, digital illustration.
    Digital illustration of diseased fatty human heart and cross-section close-up of atherosclerotic plaque histological structure, necrotic centre, foam cells and T-lymphocytes. — Stock Photo
    Digital illustration of diseased fatty human heart and cross-section close-up of atherosclerotic plaque histological structure, necrotic centre, foam cells and T-lymphocytes.
    Plasmodium vivax protozoan inside red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoan inside red blood cells, digital illustration.
    Digital artwork of white blood cells attacking red illuminated cancer cell. — Stock Photo
    Digital artwork of white blood cells attacking red illuminated cancer cell.
    Coloured scanning electron micrograph of cancer cells migrating down pores. — Stock Photo
    Coloured scanning electron micrograph of cancer cells migrating down pores.
    Molecular models of antibody structures, digital illustration. — Stock Photo
    Molecular models of antibody structures, digital illustration.
    Scientist viewing sample on glass slide before light microscope. — Stock Photo
    Scientist viewing sample on glass slide before light microscope.
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration — Stock Photo
    Plasmodium ovale protozoan inside red blood cells in the stage of schizont, computer illustration
    Abstract green colored cancer cells on tissue, digital illustration. — Stock Photo
    Abstract green colored cancer cells on tissue, digital illustration.