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    Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system — Stock Photo
    Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the body's immune system
    Low section of teenage boy standing on weighing scales. — Stock Photo
    Low section of teenage boy standing on weighing scales.
    3d rendered illustration of human nervous system. — Stock Photo
    3d rendered illustration of human nervous system.
    Digital illustration of painful thoracic spine in human skeleton. — Stock Photo
    Digital illustration of painful thoracic spine in human skeleton.
    West nile virus — Stock Photo
    West nile virus
    Illustration of colored liver in human body silhouette on black background. — Stock Photo
    Illustration of colored liver in human body silhouette on black background.
    Illustration of silhouette of obese man with visible liver. — Stock Photo
    Illustration of silhouette of obese man with visible liver.
    Human skeletal structure — Stock Photo
    Human skeletal structure
    Hip replacement implant, medical digital illustration. — Stock Photo
    Hip replacement implant, medical digital illustration.
    Brain anatomy showing blood supply system — Stock Photo
    Brain anatomy showing blood supply system
    Red blood cells — Stock Photo
    Red blood cells
    Illustration of painful ankle in human skeleton part. — Stock Photo
    Illustration of painful ankle in human skeleton part.
    Illustration of painful cervical spine in human skeleton part. — Stock Photo
    Illustration of painful cervical spine in human skeleton part.
    Sperm spermatozoa swimming towards egg cell, colored digital illustration. — Stock Photo
    Sperm spermatozoa swimming towards egg cell, colored digital illustration.
    Digital artwork of red cancer cell on tissue surface. — Stock Photo
    Digital artwork of red cancer cell on tissue surface.
    Human sperm and egg — Stock Photo
    Human sperm and egg
    Dead, dying and healthy red blood cells, conceptual digital illustration. — Stock Photo
    Dead, dying and healthy red blood cells, conceptual digital illustration.
    Illustration of human upper arm anatomy on white background. — Stock Photo
    Illustration of human upper arm anatomy on white background.
    Illustration of knee replacement implant on blue background. — Stock Photo
    Illustration of knee replacement implant on blue background.
    Male reproductive system, computer illustration. — Stock Photo
    Male reproductive system, computer illustration.
    Illustration of male office worker painful muscles. — Stock Photo
    Illustration of male office worker painful muscles.
    Male silhouette with visible upper body bones, computer illustration. — Stock Photo
    Male silhouette with visible upper body bones, computer illustration.
    Abstract female silhouette with visible brain and spinal cord of nervous system, computer illustration. — Stock Photo
    Abstract female silhouette with visible brain and spinal cord of nervous system, computer illustration.
    Foreign body in finger — Stock Photo
    Foreign body in finger
    Prevention of transplacental HIV transmission to human embryo from infected mother, conceptual illustration. — Stock Photo
    Prevention of transplacental HIV transmission to human embryo from infected mother, conceptual illustration.
    Colored digital illustration of green cancer cell. — Stock Photo
    Colored digital illustration of green cancer cell.
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract. — Stock Photo
    Digital illustration showing close-up of ciliate protozoan Balantidium coli intestinal parasite causing balantidiasis ulcer in human intestinal tract.
    Back pain localized in spine — Stock Photo
    Back pain localized in spine
    3d rendered illustration of colored female small intestine in body silhouette. — Stock Photo
    3d rendered illustration of colored female small intestine in body silhouette.
    Doctor examining eyes — Stock Photo
    Doctor examining eyes
    3d rendered illustration of blue silhouette of male legs with painful calf on black background. — Stock Photo
    3d rendered illustration of blue silhouette of male legs with painful calf on black background.
    Lymph node with filaria nematode worms, digital illustration — Stock Photo
    Lymph node with filaria nematode worms, digital illustration
    Back pain localized in spine — Stock Photo
    Back pain localized in spine
    Illustration of human kidney and light micrograph of section with glomerulus. — Stock Photo
    Illustration of human kidney and light micrograph of section with glomerulus.
    Illustration of silhouette of pregnant woman and 37 week foetus. — Stock Photo
    Illustration of silhouette of pregnant woman and 37 week foetus.
    Illustration of silhouette of obese man with visible lungs. — Stock Photo
    Illustration of silhouette of obese man with visible lungs.
    Illustration of male body silhouette on white background. — Stock Photo
    Illustration of male body silhouette on white background.
    Low angle view rendered illustration of blue silhouette of man with backache. — Stock Photo
    Low angle view rendered illustration of blue silhouette of man with backache.
    Sperm cell fertilising an egg cell — Stock Photo
    Sperm cell fertilising an egg cell
    Illustration of human foetus on week 29 term. — Stock Photo
    Illustration of human foetus on week 29 term.
    Human brain with network of blood vessels — Stock Photo
    Human brain with network of blood vessels
    Human red blood cells — Stock Photo
    Human red blood cells
    Human nervous system — Stock Photo
    Human nervous system
    Veterinarian examining cat mouth in veterinary surgery — Stock Photo
    Veterinarian examining cat mouth in veterinary surgery
    Man in defensive pose, computer illustration — Stock Photo
    Man in defensive pose, computer illustration
    Human spine pain — Stock Photo
    Human spine pain
    3d rendered illustration of blue silhouette of man with chest pain. — Stock Photo
    3d rendered illustration of blue silhouette of man with chest pain.
    Daisy pollen grain — Stock Photo
    Daisy pollen grain
    Digital illustration of painful ankle in human skeleton. — Stock Photo
    Digital illustration of painful ankle in human skeleton.
    Pain localized in knee joint — Stock Photo
    Pain localized in knee joint
    Conceptual computer illustration showing human anatomy and kidneys — Stock Photo
    Conceptual computer illustration showing human anatomy and kidneys
    Illustration of human nervous receptors on white background. — Stock Photo
    Illustration of human nervous receptors on white background.
    Female silhouette with visible heart, digital illustration. — Stock Photo
    Female silhouette with visible heart, digital illustration.
    Illustration of illuminated cancer cells on black background. — Stock Photo
    Illustration of illuminated cancer cells on black background.
    Blood clot formed by red blood cells — Stock Photo
    Blood clot formed by red blood cells
    Illustration of colored liver in human body silhouette. — Stock Photo
    Illustration of colored liver in human body silhouette.
    Tropheryma whipplei causative bacteria in human duodenum, digital illustration. — Stock Photo
    Tropheryma whipplei causative bacteria in human duodenum, digital illustration.
    Digital illustration of human digestive system and close-up of intestine bacteria. — Stock Photo
    Digital illustration of human digestive system and close-up of intestine bacteria.
    Visual render of Dengue virus — Stock Photo
    Visual render of Dengue virus
    Digital labelled illustration showing bacteria causing infections of respiratory and digestive system, Mycobacterium tuberculosis, Helicobacter pylori, Hepatitis B viruses, Entamoeba histolytica. — Stock Photo
    Digital labelled illustration showing bacteria causing infections of respiratory and digestive system, Mycobacterium tuberculosis, Helicobacter pylori, Hepatitis B viruses, Entamoeba histolytica.