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    Spring flowers representing human lungs. — Stock Photo
    Spring flowers representing human lungs.
    Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a fractured mucous membrane of the trachea (wind pipe), showing the epithelium and underlying connective tissue.
    Conceptual illustration of coronavirus particles in human lungs. — Stock Photo
    Conceptual illustration of coronavirus particles in human lungs.
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration. — Stock Photo
    Plasmodium ovale protozoan parasites and red blood cell in flow, computer illustration.
    Male doctor talking with patient on hospital bed — Stock Photo
    Male doctor talking with patient on hospital bed
    Male office worker with back pain, conceptual illustration. — Stock Photo
    Male office worker with back pain, conceptual illustration.
    Human fetus at week 31, computer illustration. — Stock Photo
    Human fetus at week 31, computer illustration.
    Skeletal system of adult female — Stock Photo
    Skeletal system of adult female
    View of working process at operating room in hospital — Stock Photo
    View of working process at operating room in hospital
    Horse anatomy and skeletal system of upper body, computer illustration. — Stock Photo
    Horse anatomy and skeletal system of upper body, computer illustration.
    Digital artwork of silhouette with liver and close-up of hepatitis C virus particles. — Stock Photo
    Digital artwork of silhouette with liver and close-up of hepatitis C virus particles.
    Female medical specialist in protective uniform, latex gloves and face mask vaccinating African American mature woman patient in clinic during coronavirus outbreak — Stock Photo
    Female medical specialist in protective uniform, latex gloves and face mask vaccinating African American mature woman patient in clinic during coronavirus outbreak
    Female doctor examining young girl back with stethoscope. — Stock Photo
    Female doctor examining young girl back with stethoscope.
    Female body silhouette with visible skeleton, digital illustration. — Stock Photo
    Female body silhouette with visible skeleton, digital illustration.
    Running man with points of joint pain, conceptual illustration. — Stock Photo
    Running man with points of joint pain, conceptual illustration.
    Thyroid gland, computer illustration. — Stock Photo
    Thyroid gland, computer illustration.
    Man standing in a marijuana greenhouse using a digital tablet, Thailand — Stock Photo
    Man standing in a marijuana greenhouse using a digital tablet, Thailand
    Illustration of senior man silhouette with visible esophagus. — Stock Photo
    Illustration of senior man silhouette with visible esophagus.
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration. — Stock Photo
    Protozoa Plasmodium falciparum, causative agent of tropical malaria in red blood cells, digital illustration.
    Haemophilus ducreyi bacteria, digital illustration. — Stock Photo
    Haemophilus ducreyi bacteria, digital illustration.
    Blurred unrecognizable medic in protective face shield mask and latex gloves with vial of coronavirus vaccine and syringe showing to camera while standing in hospital room — Stock Photo
    Blurred unrecognizable medic in protective face shield mask and latex gloves with vial of coronavirus vaccine and syringe showing to camera while standing in hospital room
    HIV virus particles — Stock Photo
    HIV virus particles
    Closeup anonymous doctor with syringe and tube with blood sample of patient for diagnostics research in veterinary clinic lab — Stock Photo
    Closeup anonymous doctor with syringe and tube with blood sample of patient for diagnostics research in veterinary clinic lab
    Red blood cells, digital illustration. — Stock Photo
    Red blood cells, digital illustration.
    Portrait of african american male professional chef wearing face mask with colleagues in background. working in a busy restaurant kitchen during coronavirus covid 19 pandemic. — Stock Photo
    Portrait of african american male professional chef wearing face mask with colleagues in background. working in a busy restaurant kitchen during coronavirus covid 19 pandemic.
    Physiotherapist examining back of a patient in clinic — Stock Photo
    Physiotherapist examining back of a patient in clinic
    Thyroid gland cancer — Stock Photo
    Thyroid gland cancer
    Side view of professional optician in mask helping senior male choosing glasses while working in optical store — Stock Photo
    Side view of professional optician in mask helping senior male choosing glasses while working in optical store
    Illustration of foot bones in human skeleton. — Stock Photo
    Illustration of foot bones in human skeleton.
    Close-up of female nurse holding premature baby. — Stock Photo
    Close-up of female nurse holding premature baby.
    Senior female doctor making rounds in hospital — Stock Photo
    Senior female doctor making rounds in hospital
    Portrait confident female scientist researching coronavirus — Stock Photo
    Portrait confident female scientist researching coronavirus
    Illustration of female silhouette with highlighted kidney infection. — Stock Photo
    Illustration of female silhouette with highlighted kidney infection.
    Human fetus at week 28, computer illustration. — Stock Photo
    Human fetus at week 28, computer illustration.
    Low angle view of female body with colored kidneys, computer illustration. — Stock Photo
    Low angle view of female body with colored kidneys, computer illustration.
    Dermatologist and female patient interacting with each other in clinic — Stock Photo
    Dermatologist and female patient interacting with each other in clinic
    Male upper body anatomy and internal organs, computer illustration. — Stock Photo
    Male upper body anatomy and internal organs, computer illustration.
    Senior woman interacting with senior man in the ward at hospital — Stock Photo
    Senior woman interacting with senior man in the ward at hospital
    Illustration of human stomach on white background. — Stock Photo
    Illustration of human stomach on white background.
    Female body model with detailed Sartorius muscle, digital illustration. — Stock Photo
    Female body model with detailed Sartorius muscle, digital illustration.
    Female dentist writing medical report in clinic — Stock Photo
    Female dentist writing medical report in clinic
    Dentist and dental assistant smiling at camera at dental clinic — Stock Photo
    Dentist and dental assistant smiling at camera at dental clinic
    Illustration of human silhouette with inflamed small intestine. — Stock Photo
    Illustration of human silhouette with inflamed small intestine.
    Measles virus particles, digital illustration. — Stock Photo
    Measles virus particles, digital illustration.
    Illustration of male office worker painful muscles. — Stock Photo
    Illustration of male office worker painful muscles.
    Illustration of senior man silhouette with visible brain. — Stock Photo
    Illustration of senior man silhouette with visible brain.
    Top view of microbes growing on agar plate on plain background. — Stock Photo
    Top view of microbes growing on agar plate on plain background.
    Dog silhouette with visible skeleton on blue background, digital illustration. — Stock Photo
    Dog silhouette with visible skeleton on blue background, digital illustration.
    From below high power surgical lamps in operating room of hospital — Stock Photo
    From below high power surgical lamps in operating room of hospital
    Cancer cells on plain background, digital illustration. — Stock Photo
    Cancer cells on plain background, digital illustration.
    High angle view of Caucasian female doctor examining the leg of mixed-race female patient in hospital — Stock Photo
    High angle view of Caucasian female doctor examining the leg of mixed-race female patient in hospital
    Scientists writing note on glass wall at lab — Stock Photo
    Scientists writing note on glass wall at lab
    Medical test machine with loaded test tubes — Stock Photo
    Medical test machine with loaded test tubes
    Coloured scanning electron micrograph of pollen grains from Verbena bonariensis perennial plant. — Stock Photo
    Coloured scanning electron micrograph of pollen grains from Verbena bonariensis perennial plant.
    Team of doctors looking at screen in conference room at hospital — Stock Photo
    Team of doctors looking at screen in conference room at hospital
    Empty test tubes in red rack. — Stock Photo
    Empty test tubes in red rack.
    Digital illustration of thyroid gland in human throat silhouette. — Stock Photo
    Digital illustration of thyroid gland in human throat silhouette.
    Young woman getting electrolysis treatment for armpit. — Stock Photo
    Young woman getting electrolysis treatment for armpit.
    Diseased stomach in male body silhouette, conceptual computer illustration. — Stock Photo
    Diseased stomach in male body silhouette, conceptual computer illustration.
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma. — Stock Photo
    Colon cancer, digital illustration and light micrograph showing colon adenocarcinoma.