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    Light micrograph of a section through tissue showing an artery (middle ) and a vein (top left). — Stock Photo
    Light micrograph of a section through tissue showing an artery (middle ) and a vein (top left).
    Red blood cells in bloodstream — Stock Photo
    Red blood cells in bloodstream
    3d rendered illustration of human vascular system. — Stock Photo
    3d rendered illustration of human vascular system.
    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
    Close-up of human blood and various medical samples in test tubes while screening in medical lab. — Stock Photo
    Close-up of human blood and various medical samples in test tubes while screening in medical lab.
    Front view of thoughtful mixed-race female patient lying in bed while pulse oximetry measures oxygen saturation in the blood in ward at hospital. — Stock Photo
    Front view of thoughtful mixed-race female patient lying in bed while pulse oximetry measures oxygen saturation in the blood in ward at hospital.
    Smiling senior female pensioner pointing at sphygmomanometer while talking on video chat against tablet during online health consultation at home — Stock Photo
    Smiling senior female pensioner pointing at sphygmomanometer while talking on video chat against tablet during online health consultation at home
    Blood vessels of the knee, computer illustration — Stock Photo
    Blood vessels of the knee, computer illustration
    HIV particles in the bloodstream — Stock Photo
    HIV particles in the bloodstream
    Medical illustration of alveoli on black background — Stock Photo
    Medical illustration of alveoli on black background
    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.
    Red blood cells and blood vessel — Stock Photo
    Red blood cells and blood vessel
    Cambodia, meat market, Combodjan market, meat hanging from hooks from ceiling, still bleeding — Stock Photo
    Cambodia, meat market, Combodjan market, meat hanging from hooks from ceiling, still bleeding
    Blood orange slices with a citrus press — Stock Photo
    Blood orange slices with a citrus press
    Lung tissue, coloured transmission electron micrograph (TEM). — Stock Photo
    Lung tissue, coloured transmission electron micrograph (TEM).
    Paramedics putting injured girl onto a backboard on street — Stock Photo
    Paramedics putting injured girl onto a backboard on street
    White blood cells with red blood cells, computer illustration. — Stock Photo
    White blood cells with red blood cells, computer illustration.
    Female body with heart attack, conceptual digital illustration. — Stock Photo
    Female body with heart attack, conceptual digital illustration.
    Male pelvis anatomy, digital illustration. — Stock Photo
    Male pelvis anatomy, 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.
    B cell and antibodies, computer illustration — Stock Photo
    B cell and antibodies, computer illustration
    Plasmodium vivax protozoa and red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoa and red blood cells, digital illustration.
    Doctor measuring blood pressure — Stock Photo
    Doctor measuring blood pressure
    Anatomy of human skin — Stock Photo
    Anatomy of human skin
    Heart anatomy in male thorax, computer illustration. — Stock Photo
    Heart anatomy in male thorax, computer illustration.
    Blood vessels of human head, digital illustration. — Stock Photo
    Blood vessels of human head, digital illustration.
    Laboratory technician noting weight of blood bags in blood bank — Stock Photo
    Laboratory technician noting weight of blood bags in blood bank
    Fresh grain muesli with clementines, blood orange and pecans — Stock Photo
    Fresh grain muesli with clementines, blood orange and pecans
    Forensic scientist taking swab from blood-stained shirt as forensic evidence. — Stock Photo
    Forensic scientist taking swab from blood-stained shirt as forensic evidence.
    Colored illustration of cancer cell being attacked by white blood cells. — Stock Photo
    Colored illustration of cancer cell being attacked by white blood cells.
    Visual render of Human skin anatomy — Stock Photo
    Visual render of Human skin anatomy
    Lymphocyte white blood cells in human lymphatic system, digital illustration. — Stock Photo
    Lymphocyte white blood cells in human lymphatic system, digital illustration.
    Spreading cancer cells on white background, computer illustration. — Stock Photo
    Spreading cancer cells on white background, computer illustration.
    Vascular system in normal female body, digital illustration — Stock Photo
    Vascular system in normal female body, digital illustration
    Physiotherapist checking blood pressure of senior woman at home — Stock Photo
    Physiotherapist checking blood pressure of senior woman at home
    Biologist with protective gloves performing a coronavirus test on a person in a car — Stock Photo
    Biologist with protective gloves performing a coronavirus test on a person in a car
    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
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    Girl sitting at a table eating a blood orange — Stock Photo
    Girl sitting at a table eating a blood orange
    Red sea water of Hormuz Island — Stock Photo
    Red sea water of Hormuz Island
    Plasmodium vivax protozoa inside blood vessel, digital illustration. — Stock Photo
    Plasmodium vivax protozoa inside blood vessel, digital illustration.
    Visible heart in female body silhouette, computer illustration. — Stock Photo
    Visible heart in female body silhouette, computer illustration.
    Winter salad of chicory — Stock Photo
    Winter salad of chicory
    Virus in human blood, computer illustration. — Stock Photo
    Virus in human blood, computer illustration.
    Italian appetiser platter — Stock Photo
    Italian appetiser platter
    Crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood — Stock Photo
    Crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood
    Plasmodium vivax protozoan inside red blood cells, digital illustration. — Stock Photo
    Plasmodium vivax protozoan inside red blood cells, digital illustration.
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Structure of dog vascular system with colorful blood vessels in transparent body, cropped, computer illustration. — Stock Photo
    Structure of dog vascular system with colorful blood vessels in transparent body, cropped, computer illustration.
    Head louse on human hair, digital illustration. — Stock Photo
    Head louse on human hair, digital illustration.
    SARS-CoV-2 viruses and activated neutrophil, conceptual computer illustration — Stock Photo
    SARS-CoV-2 viruses and activated neutrophil, conceptual computer illustration
    Digital illustration of trypanosome protozoan parasite causing sleeping sickness transmitted by blood. — Stock Photo
    Digital illustration of trypanosome protozoan parasite causing sleeping sickness transmitted by blood.
    Activated platelets in blood vessel — Stock Photo
    Activated platelets in blood vessel
    African American male doctor in medical glove demonstrating test tube with blood sample on white background — Stock Photo
    African American male doctor in medical glove demonstrating test tube with blood sample on white background
    Illustration of a dendritic cell (centre, purple) activating T-cells (teal). Dendritic cells recognise viruses and present information about their antigens to T-cells — Stock Photo
    Illustration of a dendritic cell (centre, purple) activating T-cells (teal). Dendritic cells recognise viruses and present information about their antigens to T-cells
    B-lymphocyte cells, computer illustration — Stock Photo
    B-lymphocyte cells, computer illustration
    Female silhouette showing heart anatomy, computer illustration. — Stock Photo
    Female silhouette showing heart anatomy, computer illustration.
    Neutrophil and monocyte white blood cells in blood smear, digital illustration. — Stock Photo
    Neutrophil and monocyte white blood cells in blood smear, digital illustration.
    Structure of neutrophil white blood cell, digital illustration. — Stock Photo
    Structure of neutrophil white blood cell, digital illustration.
    Human heart with disease, computer illustration. — Stock Photo
    Human heart with disease, computer illustration.