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    Scanning electron micrograph of bacterial culture from sputum. — Stock Photo
    Scanning electron micrograph of bacterial culture from sputum.
    Silica wall of a diatom — Stock Photo
    Silica wall of a diatom
    Full-term fetus — Stock Photo
    Full-term fetus
    Digital illustration of virus particles on black background. — Stock Photo
    Digital illustration of virus particles on black background.
    Illustration of transparent blue silhouette of male body with colored kidneys. — Stock Photo
    Illustration of transparent blue silhouette of male body with colored kidneys.
    Cut-away digital illustration of influenza flu virus particle. — Stock Photo
    Cut-away digital illustration of influenza flu virus particle.
    Structure of dog skeleton, cropped, computer illustration. — Stock Photo
    Structure of dog skeleton, cropped, computer illustration.
    Close-up of pipetting sample into microcentrifuge tubes. — Stock Photo
    Close-up of pipetting sample into microcentrifuge tubes.
    Radiolarians amoeboid protozoa — Stock Photo
    Radiolarians amoeboid protozoa
    Dog roundworm parasite — Stock Photo
    Dog roundworm parasite
    Human body model showing female anatomy of lungs, digital 3d render illustration. — Stock Photo
    Human body model showing female anatomy of lungs, digital 3d render illustration.
    Human fetus developing at week 5, computer illustration. — Stock Photo
    Human fetus developing at week 5, computer illustration.
    Peony flower (Paeonia officinalis), X-ray. — Stock Photo
    Peony flower (Paeonia officinalis), X-ray.
    Illustration of senior man silhouette with visible thyroid. — Stock Photo
    Illustration of senior man silhouette with visible thyroid.
    Illustration of female silhouette with highlighted kidneys. — Stock Photo
    Illustration of female silhouette with highlighted kidneys.
    Illustration of female silhouette with highlighted thyroid gland. — Stock Photo
    Illustration of female silhouette with highlighted thyroid gland.
    Female anatomy showing heart in transparent body silhouette, computer illustration. — Stock Photo
    Female anatomy showing heart in transparent body silhouette, computer illustration.
    Healthy female vascular system, computer illustration — Stock Photo
    Healthy female vascular system, computer illustration
    Yellow rod-shaped Citrobacter bacteria, digital illustration. — Stock Photo
    Yellow rod-shaped Citrobacter bacteria, digital illustration.
    Horse skeleton model with detailed Tensor fascia lata muscle, digital illustration. — Stock Photo
    Horse skeleton model with detailed Tensor fascia lata muscle, digital illustration.
    Illustration of senior man silhouette with visible liver. — Stock Photo
    Illustration of senior man silhouette with visible liver.
    Illustration of human thyroid gland in body silhouette. — Stock Photo
    Illustration of human thyroid gland in body silhouette.
    Illustration of human organs in body silhouette. — Stock Photo
    Illustration of human organs in body silhouette.
    Adult Honeybee mite — Stock Photo
    Adult Honeybee mite
    Human skeleton with red colored Brachialis muscle, computer illustration. — Stock Photo
    Human skeleton with red colored Brachialis muscle, computer illustration.
    3d rendered illustration of blue silhouette of man with chest pain on white background. — Stock Photo
    3d rendered illustration of blue silhouette of man with chest pain on white background.
    Illustration of healthy thyroid gland in human throat silhouette. — Stock Photo
    Illustration of healthy thyroid gland in human throat silhouette.
    Human stomach adenocarcinoma, computer illustration and light micrograph. — Stock Photo
    Human stomach adenocarcinoma, computer illustration and light micrograph.
    Female body showing neck anatomy, computer illustration. — Stock Photo
    Female body showing neck anatomy, computer illustration.
    3d rendered illustration of head and neck in human skeleton. — Stock Photo
    3d rendered illustration of head and neck in human skeleton.
    Female upper body lymphatic system, computer illustration. — Stock Photo
    Female upper body lymphatic system, computer illustration.
    Digital illustration of painful shoulder in human skeleton. — Stock Photo
    Digital illustration of painful shoulder in human skeleton.
    Male nervous system in body silhouette, computer illustration. — Stock Photo
    Male nervous system in body silhouette, computer illustration.
    Nervous system with brain and nerves in abstract female body, computer illustration — Stock Photo
    Nervous system with brain and nerves in abstract female body, computer illustration
    Closeup of Amoeba, computer illustration — Stock Photo
    Closeup of Amoeba, computer illustration
    Colored digital illustration of green cancer cells. — Stock Photo
    Colored digital illustration of green cancer cells.
    Echo virus structure, digital illustration. — Stock Photo
    Echo virus structure, digital illustration.
    Human skeleton model with detailed Extensor carpi ulnaris muscle, computer illustration. — Stock Photo
    Human skeleton model with detailed Extensor carpi ulnaris muscle, computer illustration.
    Anthrax bacteria, illustration. Anthrax bacteria (Bacillus anthracis) are the cause of the disease anthrax in humans and livestock. They are gram-positive spore producing bacteria arranged in chains (streptobacilli). Many cells have a central spore. — Stock Photo
    Anthrax bacteria, illustration. Anthrax bacteria (Bacillus anthracis) are the cause of the disease anthrax in humans and livestock. They are gram-positive spore producing bacteria arranged in chains (streptobacilli). Many cells have a central spore.
    Illustration of female silhouette with painful pancreas. — Stock Photo
    Illustration of female silhouette with painful pancreas.
    Medical artwork of healthy intestinal villi in digestive system. — Stock Photo
    Medical artwork of healthy intestinal villi in digestive system.
    Mature scientist using light microscope in laboratory. — Stock Photo
    Mature scientist using light microscope in laboratory.
    Illustration of healthy bone structure on white background. — Stock Photo
    Illustration of healthy bone structure on white background.
    Close-up of colourful female tachinid fly on wild plant. — Stock Photo
    Close-up of colourful female tachinid fly on wild plant.
    Internal oblique abdominal muscle, illustration. — Stock Photo
    Internal oblique abdominal muscle, illustration.
    Pregnant female Praying mantis — Stock Photo
    Pregnant female Praying mantis
    Illustration of realistic pink human brain on white background. — Stock Photo
    Illustration of realistic pink human brain on white background.
    Female brain, computer illustration — Stock Photo
    Female brain, computer illustration
    Abstract male silhouette with visible brain and nerves of nervous system, computer illustration. — Stock Photo
    Abstract male silhouette with visible brain and nerves of nervous system, computer illustration.
    Pain localized in cervical vertebrae — Stock Photo
    Pain localized in cervical vertebrae
    Head anatomy, computer illustration — Stock Photo
    Head anatomy, computer illustration
    Rose, X-ray, radiology scan — Stock Photo
    Rose, X-ray, radiology scan
    Illustration of female silhouette with highlighted pancreas cancer. — Stock Photo
    Illustration of female silhouette with highlighted pancreas cancer.
    Digital illustration showing close-up of cholera infection bacteria in small intestine. — Stock Photo
    Digital illustration showing close-up of cholera infection bacteria in small intestine.
    Medical illustration of silhouette of senior woman with highlighted brain on black background. — Stock Photo
    Medical illustration of silhouette of senior woman with highlighted brain on black background.
    Silhouette of walking obese man having joint pain, computer illustration. — Stock Photo
    Silhouette of walking obese man having joint pain, computer illustration.
    Man in defensive pose, computer illustration — Stock Photo
    Man in defensive pose, computer illustration
    Colored digital illustration of green cancer cell. — Stock Photo
    Colored digital illustration of green cancer cell.
    Horse anatomy with visible internal organs, computer illustration. — Stock Photo
    Horse anatomy with visible internal organs, computer illustration.
    Green colored probiotic rod-shaped gram-positive aerobic Bacillus clausii bacteria restoring microflora of intestine. — Stock Photo
    Green colored probiotic rod-shaped gram-positive aerobic Bacillus clausii bacteria restoring microflora of intestine.