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    Doctor holding mask over patient's mouth and doctor controlling IV drip in intensive care unit — Stock Photo
    Doctor holding mask over patient's mouth and doctor controlling IV drip in intensive care unit
    Doctors examining patient in corridor at hospital — Stock Photo
    Doctors examining patient in corridor at hospital
    Nurse putting oxygen mask on patient in hospital — Stock Photo
    Nurse putting oxygen mask on patient in hospital
    Fluffy cat with paw in blood oxygen meter lying on medical table after operation in clinic — Stock Photo
    Fluffy cat with paw in blood oxygen meter lying on medical table after operation in clinic
    Doctor examining pregnant woman during delivery in operating room — Stock Photo
    Doctor examining pregnant woman during delivery in operating room
    Red blood cells aggregated — Stock Photo
    Red blood cells aggregated
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake — Stock Photo
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake
    Doctors examining patient in corridor at hospital — Stock Photo
    Doctors examining patient in corridor at hospital
    Doctors adjusting oxygen mask while rushing the patient in emergency room at hospital — Stock Photo
    Doctors adjusting oxygen mask while rushing the patient in emergency room at hospital
    Surgeons adjusting oxygen mask on patient in operation theater of hospital — Stock Photo
    Surgeons adjusting oxygen mask on patient in operation theater of hospital
    3d illustration of red blood cells erythrocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes.
    Close-up of mixed race female nurse checking the temperature of mixed-race female patient by hand in the ward at hospital — Stock Photo
    Close-up of mixed race female nurse checking the temperature of mixed-race female patient by hand in the ward at hospital
    High angle view of thoughtful mixed race female patient relaxing in bed in the ward at hospital. Woman is keeping her hands on chest. — Stock Photo
    High angle view of thoughtful mixed race female patient relaxing in bed in the ward at hospital. Woman is keeping her hands on chest.
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Front view of beautiful mixed-race female doctor in hijab checking mixed-race female patient temperature with hand in the ward at hospital. — Stock Photo
    Front view of beautiful mixed-race female doctor in hijab checking mixed-race female patient temperature with hand in the ward at hospital.
    Team of doctors putting oxygen mask on a male senior patient face in the hospital — Stock Photo
    Team of doctors putting oxygen mask on a male senior patient face in the hospital
    Nurse consoling senior patient with doctor in hospital — Stock Photo
    Nurse consoling senior patient with doctor in hospital
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    View of distant small aircraft on azure heaven — Stock Photo
    View of distant small aircraft on azure heaven
    Low angle view of two surgeons holding laparoscopy equipment in operating theater — Stock Photo
    Low angle view of two surgeons holding laparoscopy equipment in operating theater
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells — Stock Photo
    Red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells
    Side view of content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home — Stock Photo
    Side view of content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home
    Surgeons performing operation in operation theater of hospital — Stock Photo
    Surgeons performing operation in operation theater of hospital
    Boy in oxygen mask using nebulizer during inhalation while sitting on sofa and reading book — Stock Photo
    Boy in oxygen mask using nebulizer during inhalation while sitting on sofa and reading book
    Skin blood vessel. Coloured scanning electron micrograph (SEM) of a blood vessel (arteriole) in the dermis of the skin. In the blood vessel are red blood cells (erythrocytes, red) which carry oxygen around the body — Stock Photo
    Skin blood vessel. Coloured scanning electron micrograph (SEM) of a blood vessel (arteriole) in the dermis of the skin. In the blood vessel are red blood cells (erythrocytes, red) which carry oxygen around the body
    Content mother putting on oxygen mask on face of son for inhalation procedure while sitting on sofa at home — Stock Photo
    Content mother putting on oxygen mask on face of son for inhalation procedure while sitting on sofa at home
    Scenic view of scuba divers swimming under water with fishes — Stock Photo
    Scenic view of scuba divers swimming under water with fishes
    Serious female medic in protective mask using pulse oximeter for Latin teen boy during appointment at home — Stock Photo
    Serious female medic in protective mask using pulse oximeter for Latin teen boy during appointment at home
    Doctor and ward boy pushing senior patient on stretcher in hospital corridor — Stock Photo
    Doctor and ward boy pushing senior patient on stretcher in hospital corridor
    Dark field light micrograph (LM) of freshwater pennate diatoms. — Stock Photo
    Dark field light micrograph (LM) of freshwater pennate diatoms.
    Pine forest landscape with long shadows cast by the sun in woods — Stock Photo
    Pine forest landscape with long shadows cast by the sun in woods
    Doctor practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctor practicing bag-valve-mask ventilation on training dummy.
    Close up of rapids in a mountain river with long exposure effect — Stock Photo
    Close up of rapids in a mountain river with long exposure effect
    Senior patient lying on bed with oxygen mask on face in hospital — Stock Photo
    Senior patient lying on bed with oxygen mask on face in hospital
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Measuring oxygen saturation in blood with pulse oximeter. — Stock Photo
    Measuring oxygen saturation in blood with pulse oximeter.
    Top view of crop unrecognizable doctor measuring blood oxygen of patient with heart rate monitor at table with stethoscope in clinic — Stock Photo
    Top view of crop unrecognizable doctor measuring blood oxygen of patient with heart rate monitor at table with stethoscope in clinic
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake — Stock Photo
    Snake red blood cells. Coloured scanning electron micrograph (SEM) of whole and fractured red blood cells (erythrocytes, red) in a small blood vessel of a snake
    Man talking on mobile phone and paramedics examining injured boy on street in background — Stock Photo
    Man talking on mobile phone and paramedics examining injured boy on street in background
    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
    Construction of plastic tubes and tools for treating animals in operating room of veterinary clinic — Stock Photo
    Construction of plastic tubes and tools for treating animals in operating room of veterinary clinic
    Nurse consoling senior patient with doctor in hospital — Stock Photo
    Nurse consoling senior patient with doctor in hospital
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Anesthesiologist holding oxygen mask over patients face in operating room — Stock Photo
    Anesthesiologist holding oxygen mask over patients face in operating room
    Doctor and paramedics examining a patient in emergency room at hospital — Stock Photo
    Doctor and paramedics examining a patient in emergency room at hospital
    Ward boy pushing senior patient on stretcher in hospital corridor — Stock Photo
    Ward boy pushing senior patient on stretcher in hospital corridor
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Doctor putting oxygen mask on patient in hospital — Stock Photo
    Doctor putting oxygen mask on patient in hospital
    Medical team examining pregnant woman during delivery in operating room — Stock Photo
    Medical team examining pregnant woman during delivery in operating room
    Unrecognizable person wearing silver costume with breathing apparatus and hose attached to potted plant standing in shabby abandoned room — Stock Photo
    Unrecognizable person wearing silver costume with breathing apparatus and hose attached to potted plant standing in shabby abandoned room
    Side view of content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home — Stock Photo
    Side view of content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home
    Boy in oxygen mask using nebulizer during inhalation while sitting on sofa and reading book — Stock Photo
    Boy in oxygen mask using nebulizer during inhalation while sitting on sofa and reading book
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Nurse preparing nasal cannula for delivering oxygen to patient. — Stock Photo
    Nurse preparing nasal cannula for delivering oxygen to patient.
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Crop unrecognizable doctor measuring blood oxygen of patient with heart rate monitor at table with stethoscope in clinic while using laptop — Stock Photo
    Crop unrecognizable doctor measuring blood oxygen of patient with heart rate monitor at table with stethoscope in clinic while using laptop
    Side view of beautiful mixed-race female nurse in hijab interacting with mixed-race female patient in the ward at hospital. Nurse has stethoscope around her neck. — Stock Photo
    Side view of beautiful mixed-race female nurse in hijab interacting with mixed-race female patient in the ward at hospital. Nurse has stethoscope around her neck.
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital