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    Dog roundworm eggs (Toxocara canis), light micrograph. — Stock Photo
    Dog roundworm eggs (Toxocara canis), light micrograph.
    Light microscope objective lenses in laboratory. — Stock Photo
    Light microscope objective lenses in laboratory.
    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.
    Female scientist viewing tissue sample under microscope. — Stock Photo
    Female scientist viewing tissue sample under microscope.
    Medical illustration of human cell structure on black background. — Stock Photo
    Medical illustration of human cell structure on black background.
    Blood cells, light micrograph. — Stock Photo
    Blood cells, light micrograph.
    Medical illustration of human cell structure on white background. — Stock Photo
    Medical illustration of human cell structure on white background.
    Nipah virus particles, computer illustration. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore in people who had close contact with pigs — Stock Photo
    Nipah virus particles, computer illustration. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore in people who had close contact with pigs
    Human cardiac muscle, light micrograph. Haematoxylin and eosin stain. — Stock Photo
    Human cardiac muscle, light micrograph. Haematoxylin and eosin stain.
    Close-up of light microscope stage and lenses. — Stock Photo
    Close-up of light microscope stage and lenses.
    Pseudostratified epithelium, light micrograph. Pseudostratified epithelium is a type of epithelium that comprises only a single layer of cells. — Stock Photo
    Pseudostratified epithelium, light micrograph. Pseudostratified epithelium is a type of epithelium that comprises only a single layer of cells.
    Spore-forming Microsporidia parasite, computer illustration. — Stock Photo
    Spore-forming Microsporidia parasite, computer illustration.
    Simple cuboidal epithelium, digital illustration. — Stock Photo
    Simple cuboidal epithelium, digital illustration.
    Medical illustration of human cell structure on black background. — Stock Photo
    Medical illustration of human cell structure on black background.
    Stratified cuboidal epithelium, digital illustration. — Stock Photo
    Stratified cuboidal epithelium, digital illustration.
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Transitional epithelium in urinary bladder, digital illustration. — Stock Photo
    Transitional epithelium in urinary bladder, digital illustration.
    Coloured scanning electron micrograph of bacteria from culture of breast milk. — Stock Photo
    Coloured scanning electron micrograph of bacteria from culture of breast milk.
    Close-up of light microscope stage and lenses. — Stock Photo
    Close-up of light microscope stage and lenses.
    Animal cell with mitochondria, digital illustration. — Stock Photo
    Animal cell with mitochondria, digital illustration.
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain. — Stock Photo
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. Haematoxylin and eosin stain.
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph.
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph.
    Lobar pneumonia in stage of congestion and consolidation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of congestion and consolidation, digital illustration and light micrograph.
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals. — Stock Photo
    Human lung tissue, light micrograph. Lungs are the primary organs of the respiratory system in humans and many other animals.
    Ciliated type cells, digital illustration. — Stock Photo
    Ciliated type cells, digital 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.
    Coloured scanning electron micrograph of bacteria from culture of breast milk. — Stock Photo
    Coloured scanning electron micrograph of bacteria from culture of breast milk.
    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.
    Light microscope in laboratory, close-up. — Stock Photo
    Light microscope in laboratory, close-up.
    Human blood cells, light micrograph. — Stock Photo
    Human blood cells, light micrograph.
    Medical illustration of human cell structure on white background. — Stock Photo
    Medical illustration of human cell structure on white background.
    Campylobacter jejuni bacteria — Stock Photo
    Campylobacter jejuni bacteria
    Structure of islet of langerhans, light micrograph. — Stock Photo
    Structure of islet of langerhans, light micrograph.
    Illustration of motor protein cellular structure. — Stock Photo
    Illustration of motor protein cellular structure.
    Abstract close-up of grey fabric structure, digital illustration. — Stock Photo
    Abstract close-up of grey fabric structure, digital illustration.
    Light micrograph of liver fluke eggs in a fish fin. — Stock Photo
    Light micrograph of liver fluke eggs in a fish fin.
    Pseudostratified columnar epithelium, digital illustration. — Stock Photo
    Pseudostratified columnar epithelium, digital illustration.
    Close-up of light microscope lenses on white background. — Stock Photo
    Close-up of light microscope lenses on white background.
    Structure of islet of langerhans, light micrograph. — Stock Photo
    Structure of islet of langerhans, light micrograph.
    Animal cells with mitochondria, digital illustration. — Stock Photo
    Animal cells with mitochondria, digital illustration.
    Abstract close-up of pink fabric structure, digital illustration. — Stock Photo
    Abstract close-up of pink fabric structure, digital illustration.
    Cross-section of spinal cord, light micrograph. — Stock Photo
    Cross-section of spinal cord, light micrograph.
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph. — Stock Photo
    Human cell infected with Simian Immunodeficiency Virus from sooty mangabey, colored scanning electron micrograph.
    Simple columnar epithelium, light micrograph — Stock Photo
    Simple columnar epithelium, light micrograph
    Light micrograph of onion (Allium cepa) root tip cells undergoing mitosis (nuclear division). — Stock Photo
    Light micrograph of onion (Allium cepa) root tip cells undergoing mitosis (nuclear division).
    Simple squamous epithelium, digital illustration. — Stock Photo
    Simple squamous epithelium, digital illustration.
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph. — Stock Photo
    Lobar pneumonia in stage of grey hepatisation or late consolidation, digital illustration and light micrograph.
    Intestinal microvilli. Coloured scanning electron micrograph (SEM) of microvilli from the small intestine. These tiny structures form a dense brush-like covering on the absorptive surfaces of the cells lining the small intestine — Stock Photo
    Intestinal microvilli. Coloured scanning electron micrograph (SEM) of microvilli from the small intestine. These tiny structures form a dense brush-like covering on the absorptive surfaces of the cells lining the small intestine
    Digital illustration of nerve neurons cells. — Stock Photo
    Digital illustration of nerve neurons cells.
    Nipah virus particles, computer illustration. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore in people who had close contact with pigs — Stock Photo
    Nipah virus particles, computer illustration. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore in people who had close contact with pigs
    Illustration of Nipah viruses binding to receptors on human cells, an initial stage of Nipah infection. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore — Stock Photo
    Illustration of Nipah viruses binding to receptors on human cells, an initial stage of Nipah infection. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore
    Medical illustration of human cell structure on white background. — Stock Photo
    Medical illustration of human cell structure on white background.
    Light micrograph (LM) showing blood supply to muscle fibers. — Stock Photo
    Light micrograph (LM) showing blood supply to muscle fibers.
    Tongue surface, light micrograph and computer illustration. — Stock Photo
    Tongue surface, light micrograph and computer illustration.
    Medical illustration of human cell structure on dark background. — Stock Photo
    Medical illustration of human cell structure on dark background.
    Medical illustration of human cell structure on dark background. — Stock Photo
    Medical illustration of human cell structure on dark background.
    Light microscope on laboratory bench. — Stock Photo
    Light microscope on laboratory bench.
    Digital illustration of human cilia cells. — Stock Photo
    Digital illustration of human cilia cells.
    Illustration of Nipah viruses binding to receptors on human cells, an initial stage of Nipah infection. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore — Stock Photo
    Illustration of Nipah viruses binding to receptors on human cells, an initial stage of Nipah infection. Nipah virus is zoonotic (transmitted to humans from animals) and was first found in Malaysia and Singapore