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    Influenza viruses and host cell — Stock Photo
    Influenza viruses and host cell
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Blade of grass with a serrated edge — Stock Photo
    Blade of grass with a serrated edge
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Digital illustration of cell in early stage of programmed cell death. — Stock Photo
    Digital illustration of cell in early stage of programmed cell death.
    Flowering currant pollen grains — Stock Photo
    Flowering currant pollen grains
    Mature virus and budding release of HIV — Stock Photo
    Mature virus and budding release of HIV
    Coloured scanning electron micrograph (SEM) Pet dander. dog hair, cat hair and dead skin. — Stock Photo
    Coloured scanning electron micrograph (SEM) Pet dander. dog hair, cat hair and dead skin.
    Carcinoma cell, coloured transmission electron micrograph (TEM). — Stock Photo
    Carcinoma cell, coloured transmission electron micrograph (TEM).
    Leech, coloured scanning electron micrograph (SEM). — Stock Photo
    Leech, coloured scanning electron micrograph (SEM).
    Lining of the small intestine — Stock Photo
    Lining of the small intestine
    Briefcase with various items, X-ray. — Stock Photo
    Briefcase with various items, X-ray.
    Phlox pollen grain — Stock Photo
    Phlox pollen grain
    Digital illustration of Lyme disease tick parasite. — Stock Photo
    Digital illustration of Lyme disease tick parasite.
    Eyelash follicle, coloured scanning electron micrograph (SEM). — Stock Photo
    Eyelash follicle, coloured scanning electron micrograph (SEM).
    Diatoms. Coloured scanning electron micrograph (SEM) of Campylodiscus species diatoms. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species — Stock Photo
    Diatoms. Coloured scanning electron micrograph (SEM) of Campylodiscus species diatoms. The diatoms are a group of photosynthetic, single-celled algae containing about 100, 000 species
    Colored X-ray of section through thoracic spine of senior male patient with ankylosing spondylitis with severe degeneration of lower thoracic spine. — Stock Photo
    Colored X-ray of section through thoracic spine of senior male patient with ankylosing spondylitis with severe degeneration of lower thoracic spine.
    Colored computed tomography scan of section through brain of senior male patient with dementia. — Stock Photo
    Colored computed tomography scan of section through brain of senior male patient with dementia.
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus. — Stock Photo
    Coloured computed tomography (CT) scan of a section through the chest of a 76-year-old male patient with a malignant (cancerous) tumour (bright, right) of the bronchus.
    Coloured scanning electron micrograph of ovarian cancer cells. — Stock Photo
    Coloured scanning electron micrograph of ovarian cancer cells.
    Transparent view of human torso showing liver — Stock Photo
    Transparent view of human torso showing liver
    Chicken eggshell cross section — Stock Photo
    Chicken eggshell cross section
    Epithelium from a fallopian tube — Stock Photo
    Epithelium from a fallopian tube
    Komodo dragon skin, coloured scanning electron micrograph (SEM). The Komodo dragon (Varanus komodoensis) has armoured scaly skin. It is the largest lizard in the world, reaching over three metres in length — Stock Photo
    Komodo dragon skin, coloured scanning electron micrograph (SEM). The Komodo dragon (Varanus komodoensis) has armoured scaly skin. It is the largest lizard in the world, reaching over three metres in length
    B-lymphocyte white blood cells — Stock Photo
    B-lymphocyte white blood cells
    Piece of cake with close-up of Staphylococcus bacteria, food poisoning conceptual illustration. — Stock Photo
    Piece of cake with close-up of Staphylococcus bacteria, food poisoning conceptual illustration.
    Coloured scanning electron micrograph of Phasmarhabditis hermaphrodita microscopic nematode parasite of Rhabditidae. — Stock Photo
    Coloured scanning electron micrograph of Phasmarhabditis hermaphrodita microscopic nematode parasite of Rhabditidae.
    Cardiac muscle from a healthy heart — Stock Photo
    Cardiac muscle from a healthy heart
    Roquefort cheese and digital illustration of fungus Penicillium roqueforti. — Stock Photo
    Roquefort cheese and digital illustration of fungus Penicillium roqueforti.
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen. — Stock Photo
    Composite image of nasal epithelium and pollen. Coloured Scanning Electron Micrograph (SEM) of the surface of nasal epithelium with inhaled in pollen.
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake — Stock Photo
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake
    Coloured scanning electron micrograph of bacteria from culture of breast milk. — Stock Photo
    Coloured scanning electron micrograph of bacteria from culture of breast milk.
    Roquefort cheese and digital illustration of fungus Penicillium roqueforti. — Stock Photo
    Roquefort cheese and digital illustration of fungus Penicillium roqueforti.
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph. — Stock Photo
    Caenorhabditis elegans parasite worm, colored scanning electron micrograph.
    Geranium pollen grain — Stock Photo
    Geranium pollen grain
    Nasturtium leaf. Coloured scanning electron micrograph (SEM) of the underside of a nasturtium leaf (Tropaeolum sp.). Numerous hairs (trichomes) cover the surface — Stock Photo
    Nasturtium leaf. Coloured scanning electron micrograph (SEM) of the underside of a nasturtium leaf (Tropaeolum sp.). Numerous hairs (trichomes) cover the surface
    X-ray of large shoulder lipoma — Stock Photo
    X-ray of large shoulder lipoma
    Fibrosarcoma cells in late stage of mitosis — Stock Photo
    Fibrosarcoma cells in late stage of mitosis
    Coloured scanning electron micrograph of cultured cancer cell from human cervix showing numerous microvilli. — Stock Photo
    Coloured scanning electron micrograph of cultured cancer cell from human cervix showing numerous microvilli.
    Dental prosthesis in plastic bag, close-up. — Stock Photo
    Dental prosthesis in plastic bag, close-up.
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Escherichia coli on the surface of human skin — Stock Photo
    Escherichia coli on the surface of human skin
    Colored scanning electron micrograph of pollen grains from convolvulus flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from convolvulus flower.
    Digital illustration of Legionella pneumophila bacteria causing Legionnaires disease. — Stock Photo
    Digital illustration of Legionella pneumophila bacteria causing Legionnaires disease.
    Bottlebrush pollen grain — Stock Photo
    Bottlebrush pollen grain
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans — Stock Photo
    Plankton. Coloured scanning electron micrograph (SEM) of plankton containing mainly Ceratium dinoflagellates. A few diatoms are also present. Dinoflagellates are unicellular protozoans
    Od shaped bacteria Tragelaphus — Stock Photo
    Od shaped bacteria Tragelaphus
    Coloured scanning electron micrograph of 293T cell infected with human immunodeficiency virus. — Stock Photo
    Coloured scanning electron micrograph of 293T cell infected with human immunodeficiency virus.
    Plaque-forming bacteria, colored scanning electron micrograph. — Stock Photo
    Plaque-forming bacteria, colored scanning electron micrograph.
    Coloured scanning electron micrograph of bacteria cultured from used dishcloth. — Stock Photo
    Coloured scanning electron micrograph of bacteria cultured from used dishcloth.
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus. — Stock Photo
    Illustration of fruiting bodies and hyphae of fungus Aspergillus fumigatus.
    Bacteria found in a sample of human faeces — Stock Photo
    Bacteria found in a sample of human faeces
    Colored scanning electron micrograph of anthrax gram-positive, rod-shaped bacteria known as Bacillus anthracis. — Stock Photo
    Colored scanning electron micrograph of anthrax gram-positive, rod-shaped bacteria known as Bacillus anthracis.
    Activated blood cell fragments platelets, coloured scanning electron micrograph. — Stock Photo
    Activated blood cell fragments platelets, coloured scanning electron micrograph.
    Blackberries and blueberries, coloured X-ray. — Stock Photo
    Blackberries and blueberries, coloured X-ray.
    Red blood cells — Stock Photo
    Red blood cells
    White blood cell — Stock Photo
    White blood cell
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Clownfish snuggling in host anemone — Stock Photo
    Clownfish snuggling in host anemone