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    Man holding knee in pain, close-up. — Stock Photo
    Man holding knee in pain, close-up.
    Hydatid disease in liver, cystic echinococcosis, Computer illustration — Stock Photo
    Hydatid disease in liver, cystic echinococcosis, Computer illustration
    Illustration of inflamed mammary glands in human body. — Stock Photo
    Illustration of inflamed mammary glands in human body.
    3d rendered illustration of blue silhouette of man with chest pain. — Stock Photo
    3d rendered illustration of blue silhouette of man with chest pain.
    People looking at a small colony of Penguins — Stock Photo
    People looking at a small colony of Penguins
    Human stomach mucinous adenocarcinoma, computer illustration and light micrograph. — Stock Photo
    Human stomach mucinous adenocarcinoma, computer illustration and light micrograph.
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot — Stock Photo
    Feet bacteria. Coloured scanning electron micrograph (SEM) of bacteria cultured from between toes of foot
    Illustration of senior man silhouette with visible lung cancer. — Stock Photo
    Illustration of senior man silhouette with visible lung cancer.
    Highlighted cavern in lung with well-formed fibrous layer, digital artwork. — Stock Photo
    Highlighted cavern in lung with well-formed fibrous layer, digital artwork.
    CUBA - AUGUST 27, 2016: Front view of man sitting on shabby fence at street scene — Stock Photo
    CUBA - AUGUST 27, 2016: Front view of man sitting on shabby fence at street scene
    Men working in a reclaimed timber yard. — Stock Photo
    Men working in a reclaimed timber yard.
    Illustration of rectal cancer in human body silhouette. — Stock Photo
    Illustration of rectal cancer in human body silhouette.
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration — Stock Photo
    Hydatid disease in liver caused by larvae of parasitic tapeworm Echinococcus multilocularis, computer illustration
    Sickle cell anemia — Stock Photo
    Sickle cell anemia
    Diseased stomach in abstract female body, digital illustration. — Stock Photo
    Diseased stomach in abstract female body, digital illustration.
    Plasmodium ovale protozoan, digital illustration. — Stock Photo
    Plasmodium ovale protozoan, digital illustration.
    From below of domestic cat sitting in small window of aged decayed building in poor neighborhood of Jeddah city in Saudi Arabia — Stock Photo
    From below of domestic cat sitting in small window of aged decayed building in poor neighborhood of Jeddah city in Saudi Arabia
    Digital artwork of illuminated red human cancer cell. — Stock Photo
    Digital artwork of illuminated red human cancer cell.
    Chronic pyelonephritis, computer illustration and light micrograph — Stock Photo
    Chronic pyelonephritis, computer illustration and light micrograph
    Parasitic amoeba engulfing red blood cells — Stock Photo
    Parasitic amoeba engulfing red blood cells
    Student in wheelchair examining air conditioner high pressure line in HVAC classroom — Stock Photo
    Student in wheelchair examining air conditioner high pressure line in HVAC classroom
    Stomach cancer in female body, conceptual computer illustration. — Stock Photo
    Stomach cancer in female body, conceptual computer illustration.
    Illustration of painful back in human skeleton part. — Stock Photo
    Illustration of painful back in human skeleton part.
    Pox virus, computer illustration — Stock Photo
    Pox virus, computer illustration
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells. — Stock Photo
    Digital illustration of Neisseria gonorrhoeae bacteria inside neutrophil white blood cells.
    Plasmodium malariae protozoa in blood vessel, computer illustration. — Stock Photo
    Plasmodium malariae protozoa in blood vessel, computer illustration.
    Cups with eggs and colored dye for Easter — Stock Photo
    Cups with eggs and colored dye for Easter
    Abstract human immunodeficiency virus structure, scientific digital informative illustration. — Stock Photo
    Abstract human immunodeficiency virus structure, scientific digital informative illustration.
    Cancer cells with blood vessel formation — Stock Photo
    Cancer cells with blood vessel formation
    Man in defensive pose, computer illustration — Stock Photo
    Man in defensive pose, computer illustration
    Back view of woman walking between green plants and bushes inside of old greenhouse with high ceiling and arched window, Scotland — Stock Photo
    Back view of woman walking between green plants and bushes inside of old greenhouse with high ceiling and arched window, Scotland
    Farmer check soil condition — Stock Photo
    Farmer check soil condition
    Colored scanning electron micrograph of rod-shaped, gram-negative bacteria Escherichia coli of human intestine. — Stock Photo
    Colored scanning electron micrograph of rod-shaped, gram-negative bacteria Escherichia coli of human intestine.
    Chinese couple buying air conditioner in electronics store — Stock Photo
    Chinese couple buying air conditioner in electronics store
    Diseased liver in male body silhouette, digital illustration. — Stock Photo
    Diseased liver in male body silhouette, digital illustration.
    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.
    Abstract transparent male body with glowing thyroid cancer, digital illustration. — Stock Photo
    Abstract transparent male body with glowing thyroid cancer, digital illustration.
    Computer illustration of co-infection with two major respiratory pathogenic bacteria, Mycobacterium tuberculosis (rod-shaped) and Streptococcus pneumonia (spherical) — Stock Photo
    Computer illustration of co-infection with two major respiratory pathogenic bacteria, Mycobacterium tuberculosis (rod-shaped) and Streptococcus pneumonia (spherical)
    Echinococcosis multilocularis hydatid cyst, computer illustration — Stock Photo
    Echinococcosis multilocularis hydatid cyst, computer illustration
    Whipple disease bacteria Tropheryma whipplei, digital illustration. — Stock Photo
    Whipple disease bacteria Tropheryma whipplei, digital illustration.
    Botulism bacterium. Illustration of botulism bacteria (Clostridium botulinum). These bacteria occur naturally in soil. They produce botulinum toxin, a powerful neurotoxin that can be ingested on contaminated, improperly cooked food — Stock Photo
    Botulism bacterium. Illustration of botulism bacteria (Clostridium botulinum). These bacteria occur naturally in soil. They produce botulinum toxin, a powerful neurotoxin that can be ingested on contaminated, improperly cooked food
    Malaria-infected mosquito piercing skin and transmitting malaria parasites into bloodstream. — Stock Photo
    Malaria-infected mosquito piercing skin and transmitting malaria parasites into bloodstream.
    Diseased lungs in transparent female body on black background, computer illustration. — Stock Photo
    Diseased lungs in transparent female body on black background, computer illustration.
    Illustration of cancerous tumour in female bladder. — Stock Photo
    Illustration of cancerous tumour in female bladder.
    Still life of fresh round green savoy cabbage. — Stock Photo
    Still life of fresh round green savoy cabbage.
    Tuberculosis bacteria. Computer illustration of Mycobacterium tuberculosis bacteria, the Gram-positive rod-shaped bacteria which cause the disease tuberculosis — Stock Photo
    Tuberculosis bacteria. Computer illustration of Mycobacterium tuberculosis bacteria, the Gram-positive rod-shaped bacteria which cause the disease tuberculosis
    Light micrograph of a section through breast tissue showing mastitis (inflammation) of breast. — Stock Photo
    Light micrograph of a section through breast tissue showing mastitis (inflammation) of breast.
    Cancer cell, computer illustration — Stock Photo
    Cancer cell, computer illustration
    Brain cancer, conceptual computer illustration — Stock Photo
    Brain cancer, conceptual computer illustration
    Colored digital artwork of cancer cell. — Stock Photo
    Colored digital artwork of cancer cell.
    Brain with aneurysm in the middle cerebral artery — Stock Photo
    Brain with aneurysm in the middle cerebral artery
    Sitka Spruce and Western Hemlock trees — Stock Photo
    Sitka Spruce and Western Hemlock trees
    Illustration of red and inflamed human appendix and close-up of bacteria causative agents of appendicitis. — Stock Photo
    Illustration of red and inflamed human appendix and close-up of bacteria causative agents of appendicitis.
    Chronic pyelonephritis, computer illustration and light micrograph — Stock Photo
    Chronic pyelonephritis, computer illustration and light micrograph
    Covid-19 coronavirus particles, computer illustration. The new coronavirus SARS-CoV-2 (previously 2019-CoV) emerged in Wuhan, China, in December 2019 — Stock Photo
    Covid-19 coronavirus particles, computer illustration. The new coronavirus SARS-CoV-2 (previously 2019-CoV) emerged in Wuhan, China, in December 2019
    Illustration of silhouette of obese man with visible adrenal glands. — Stock Photo
    Illustration of silhouette of obese man with visible adrenal glands.
    Coronavirus infection, conceptual illustration. — Stock Photo
    Coronavirus infection, conceptual illustration.
    Colored norovirus particles, digital illustration. — Stock Photo
    Colored norovirus particles, digital illustration.
    Abstract pink colored cancer cell on black background, digital illustration. — Stock Photo
    Abstract pink colored cancer cell on black background, digital illustration.
    Plasmodium vivax protozoa inside blood vessel, digital illustration. — Stock Photo
    Plasmodium vivax protozoa inside blood vessel, digital illustration.