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    From above content sick boy using respirator and breathing oxygen from inhaler while lying down on sofa at home — Stock Photo
    From above content sick boy using respirator and breathing oxygen from inhaler while lying down on sofa at home
    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
    Female radiologist examining equipment. — Stock Photo
    Female radiologist examining equipment.
    Paramedics examining patient in ambulance — Stock Photo
    Paramedics examining patient in ambulance
    Doctor and nurse pushing senior patient on stretcher in hospital corridor — Stock Photo
    Doctor and nurse pushing senior patient on stretcher in hospital corridor
    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
    Front view of mixed race female doctor in hijab consoling mature mixed race female patient in the ward at hospital. — Stock Photo
    Front view of mixed race female doctor in hijab consoling mature mixed race female patient in the ward at hospital.
    Content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home — Stock Photo
    Content sick boy using respirator and breathing oxygen from inhaler while sitting on sofa at home
    Red blood cells aggregated — Stock Photo
    Red blood cells aggregated
    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
    Close-up of patient with oxygen mask in operating room — Stock Photo
    Close-up of patient with oxygen mask in operating room
    Front view of beautiful mixed-race female doctor in hijab giving medicine to mixed-race female patient in the ward at hospital. — Stock Photo
    Front view of beautiful mixed-race female doctor in hijab giving medicine to mixed-race female patient in the ward at hospital.
    Team of doctors giving oxygen to patient in intensive care unit — Stock Photo
    Team of doctors giving oxygen to patient in intensive care unit
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Doctor holding oxygen mask over patient, male doctor adjusting IV drip — Stock Photo
    Doctor holding oxygen mask over patient, male doctor adjusting IV drip
    Side view unrecognizable person wearing silver costume with breathing apparatus and hose attached to potted plant standing in shabby abandoned room — Stock Photo
    Side view unrecognizable person wearing silver costume with breathing apparatus and hose attached to potted plant standing in shabby abandoned room
    Using pulse oximeter at home to test oxygen level in blood. — Stock Photo
    Using pulse oximeter at home to test oxygen level in blood.
    Close-up of senior patient wearing oxygen mask lying on hospital bed — Stock Photo
    Close-up of senior patient wearing oxygen mask lying on hospital bed
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration. — Stock Photo
    Leaf epidermis, light micrograph. Leaf epidermis has small pores, called stomata, which open up for photosynthetic gas exchange and transpiration.
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Landscape in the Simien Mountains National Park. View from peak Imet Gogo over the highlands, the escarpment and the lowlands of the National Park with the endemic Giant Lobelia Lobelia rhynchopetalum. Imet Gogo is the best known viewpoint in the Pa — Stock Photo
    Landscape in the Simien Mountains National Park. View from peak Imet Gogo over the highlands, the escarpment and the lowlands of the National Park with the endemic Giant Lobelia Lobelia rhynchopetalum. Imet Gogo is the best known viewpoint in the Pa
    Doctor, nurse and paramedics examining patient on stretcher — Stock Photo
    Doctor, nurse and paramedics examining patient on stretcher
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    Scuba diver underwater under sun beams — Stock Photo
    Scuba diver underwater under sun beams
    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
    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
    Cardiovascular system transporting nutrients and oxygen — Stock Photo
    Cardiovascular system transporting nutrients and oxygen
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Crop unrecognizable female vet with coworker in uniform standing at medical table with cat and tools during surgery — Stock Photo
    Crop unrecognizable female vet with coworker in uniform standing at medical table with cat and tools during surgery
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Close-up of iv drip bottle next to the patients bed in hospital room — Stock Photo
    Close-up of iv drip bottle next to the patients bed in hospital room
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Portrait of Caucasian male patient relaxing in bed in the ward at hospital — Stock Photo
    Portrait of Caucasian male patient relaxing in bed in the ward at hospital
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Female doctor wearing surgical clothing anesthetizing patient in operating theater — Stock Photo
    Female doctor wearing surgical clothing anesthetizing patient in operating theater
    Hands of doctor placing oxygen mask on a pregnant woman face in operating room — Stock Photo
    Hands of doctor placing oxygen mask on a pregnant woman face in operating room
    Senior woman with nasal cannula and IV bag and nurse holding tray in background, close-up. — Stock Photo
    Senior woman with nasal cannula and IV bag and nurse holding tray in background, close-up.
    Female patient with nasal cannula. — Stock Photo
    Female patient with nasal cannula.
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Front view of surgeons concentrated performing operation in operating room at hospital against spots and digital screen in background — Stock Photo
    Front view of surgeons concentrated performing operation in operating room at hospital against spots and digital screen in background
    Side view unrecognizable person wearing silver costume with breathing apparatus and hose attached to potted plant standing in shabby abandoned room — Stock Photo
    Side view unrecognizable person wearing silver costume with breathing apparatus and hose attached to potted plant standing in shabby abandoned room
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Side view of little boy with asthma using inhaler while sitting on sofa at home — Stock Photo
    Side view of little boy with asthma using inhaler while sitting on sofa at home
    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
    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
    Cancer cells with blood vessel formation — Stock Photo
    Cancer cells with blood vessel formation
    Red blood cells — Stock Photo
    Red blood cells
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Red blood cells flowing inside an artery — Stock Photo
    Red blood cells flowing inside an artery
    Human Platelets, computer illustration — Stock Photo
    Human Platelets, computer illustration
    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
    Front view of Caucasian male patient sleeping in bed in the ward at hospital — Stock Photo
    Front view of Caucasian male patient sleeping in bed in the ward at hospital
    Group of surgeons performing operation in operation theater of hospital — Stock Photo
    Group of surgeons performing operation in operation theater of hospital
    Doctor and paramedics examining a patient in emergency room at hospital — Stock Photo
    Doctor and paramedics examining a patient in emergency room at hospital
    Cheerful child breathing in oxygen mask during inhalation and playing with soft toy on couch at home — Stock Photo
    Cheerful child breathing in oxygen mask during inhalation and playing with soft toy on couch at home
    High angle of crop mother using nebulizer for inhalation of boy sitting in oxygen mask on sofa — Stock Photo
    High angle of crop mother using nebulizer for inhalation of boy sitting in oxygen mask on sofa
    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
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Scenic view of scuba divers swimming under water — Stock Photo
    Scenic view of scuba divers swimming under water