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    Pulse oximeter, blood oxygen saturation monitor. — Stock Photo
    Pulse oximeter, blood oxygen saturation monitor.
    Medical illustration of human blood vessels of legs. — Stock Photo
    Medical illustration of human blood vessels of legs.
    Male anatomy with tissue and systems — Stock Photo
    Male anatomy with tissue and systems
    Active CAR T-cells cancer immunotherapy, medical illustration. — Stock Photo
    Active CAR T-cells cancer immunotherapy, medical illustration.
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration. — Stock Photo
    Astrocyte brain glial cell connecting neuronal cells to blood vessel, digital illustration.
    Anonymous focused male surgeon in blue gown mask and magnifying eyeglasses standing near sterile field with various medical tools during operation in modern clinic — Stock Photo
    Anonymous focused male surgeon in blue gown mask and magnifying eyeglasses standing near sterile field with various medical tools during operation in modern clinic
    Cropped shot of physician measuring patient'd blood pressure with tonometer — Stock Photo
    Cropped shot of physician measuring patient'd blood pressure with tonometer
    Cross-section of human artery — Stock Photo
    Cross-section of human artery
    Still life with a white plate on a black table and a yellow flower — Stock Photo
    Still life with a white plate on a black table and a yellow flower
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus — Stock Photo
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus
    Black horse in field — Stock Photo
    Black horse in field
    Red blood cells in blood stream — Stock Photo
    Red blood cells in blood stream
    Coloured angiogram (blood vessel X-ray) of the coronary arteries of a 52 year old patient. The artery at right has had a stent placed in it to treat a blockage. — Stock Photo
    Coloured angiogram (blood vessel X-ray) of the coronary arteries of a 52 year old patient. The artery at right has had a stent placed in it to treat a blockage.
    Illustration of heart in human body silhouette. — Stock Photo
    Illustration of heart in human body silhouette.
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration — Stock Photo
    Protozoan Plasmodium malariae inside red blood cell in the schizont stage, computer illustration
    3d rendered illustration of little tick on skin surface. — Stock Photo
    3d rendered illustration of little tick on skin surface.
    Spreading cancer cells on white background, computer illustration. — Stock Photo
    Spreading cancer cells on white background, computer illustration.
    Crop unrecognizable veterinarian measuring pulse of cat with blood oxygen meter during operation in clinic — Stock Photo
    Crop unrecognizable veterinarian measuring pulse of cat with blood oxygen meter during operation in clinic
    Various citrus fruit: mandarins, pink grapefruits, kumquats, oranges and blood oranges — Stock Photo
    Various citrus fruit: mandarins, pink grapefruits, kumquats, oranges and blood oranges
    Blood moon over mountains in Walla Walla — Stock Photo
    Blood moon over mountains in Walla Walla
    Illustration of transparent gray silhouette of male body with colored heart. — Stock Photo
    Illustration of transparent gray silhouette of male body with colored heart.
    Illustration of malaria infected blood cells. — Stock Photo
    Illustration of malaria infected blood cells.
    Syringe dripping blood droplet into test tubes. — Stock Photo
    Syringe dripping blood droplet into test tubes.
    Red blood cells — Stock Photo
    Red blood cells
    Arteries in transparent dog body, anatomical computer illustration. — Stock Photo
    Arteries in transparent dog body, anatomical computer illustration.
    Doctor using a lance to take a finger prick blood sample from a patient. — Stock Photo
    Doctor using a lance to take a finger prick blood sample from a patient.
    Realistic human heart and blood vessels on black background, digital illustration. — Stock Photo
    Realistic human heart and blood vessels on black background, digital illustration.
    Digital illustration of mosquito sucking blood on skin. — Stock Photo
    Digital illustration of mosquito sucking blood on skin.
    Red blood cells — Stock Photo
    Red blood cells
    Moro blood oranges close-up view — Stock Photo
    Moro blood oranges close-up view
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus — Stock Photo
    T-cells (turquoise) binding to cancer cells (pink), illustration. T-lymphocytes, or T-cells, are a type of white blood cell and components of the body's immune system. They mature in the thymus
    Parasitic tick biting skin — Stock Photo
    Parasitic tick biting skin
    Digital artwork of T-lymphocyte cells attacking red cancer cell. — Stock Photo
    Digital artwork of T-lymphocyte cells attacking red cancer cell.
    Illustration of heart in human body silhouette. — Stock Photo
    Illustration of heart in human body silhouette.
    Atherosclerosis harming blood vessel — Stock Photo
    Atherosclerosis harming blood vessel
    Doctor taking blood sample — Stock Photo
    Doctor taking blood sample
    Fresh Blood oranges with leaves — Stock Photo
    Fresh Blood oranges with leaves
    Blood vessels of the head, computer illustration — Stock Photo
    Blood vessels of the head, computer illustration
    Male abdominal blood vessels, digital illustration. — Stock Photo
    Male abdominal blood vessels, digital illustration.
    Human Platelets, computer illustration — Stock Photo
    Human Platelets, computer illustration
    Visible heart in female body silhouette, computer illustration. — Stock Photo
    Visible heart in female body silhouette, computer illustration.
    Close-up of external filter for treatment of patient with kidney failure. — Stock Photo
    Close-up of external filter for treatment of patient with kidney failure.
    Normal White blood cell — Stock Photo
    Normal White blood cell
    Doctor checking senior woman blood pressure — Stock Photo
    Doctor checking senior woman blood pressure
    Petri dishes with blood samples on plain background. — Stock Photo
    Petri dishes with blood samples on plain background.
    Vascular system in normal female body, digital illustration — Stock Photo
    Vascular system in normal female body, digital illustration
    Illustration of senior woman silhouette with colored heart on white background. — Stock Photo
    Illustration of senior woman silhouette with colored heart on white background.
    Head louse on white background, digital illustration. — Stock Photo
    Head louse on white background, digital illustration.
    Digital illustration of hypochromic and microcytic red blood cells while iron deficiency anaemia. — Stock Photo
    Digital illustration of hypochromic and microcytic red blood cells while iron deficiency anaemia.
    Normal red blood cells — Stock Photo
    Normal red blood cells
    Closeup top view of chocolate mould on blood orange slices — Stock Photo
    Closeup top view of chocolate mould on blood orange slices
    Stacked Petri dishes with blood agar on plain background. — Stock Photo
    Stacked Petri dishes with blood agar on plain background.
    Hands of butcher slicing red meat at butchers shop — Stock Photo
    Hands of butcher slicing red meat at butchers shop
    Ebola virus particle in blood stream, digital illustration. — Stock Photo
    Ebola virus particle in blood stream, digital illustration.
    Diseased blood cells with bacteria, computer illustration. — Stock Photo
    Diseased blood cells with bacteria, computer illustration.
    PCR micro tube strip with red liquid. — Stock Photo
    PCR micro tube strip with red liquid.
    Coronavirus infection, conceptual illustration. — Stock Photo
    Coronavirus infection, conceptual illustration.
    Illustration of malaria infected blood cells. — Stock Photo
    Illustration of malaria infected blood cells.
    Virus particles spreading through blood stream — Stock Photo
    Virus particles spreading through blood stream
    Male shoulder anatomy, digital illustration. — Stock Photo
    Male shoulder anatomy, digital illustration.