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    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
    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
    Boy using nebulizer to treat asthma. — Stock Photo
    Boy using nebulizer to treat asthma.
    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
    Scenic view of scuba divers silhouettes swimming under water — Stock Photo
    Scenic view of scuba divers silhouettes swimming under water
    Cardiovascular system transporting nutrients and oxygen — Stock Photo
    Cardiovascular system transporting nutrients and oxygen
    Front view of diverse male patients interacting with each other in the ward at hospital. — Stock Photo
    Front view of diverse male patients interacting with each other in the ward at hospital.
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    Surgeons performing operation in operation theater of hospital — Stock Photo
    Surgeons performing operation in operation theater of hospital
    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.
    Red blood cells — Stock Photo
    Red blood cells
    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
    Female patient with nasal cannula. — Stock Photo
    Female patient with nasal cannula.
    Surgeons adjusting oxygen mask on patient in operation theater of hospital — Stock Photo
    Surgeons adjusting oxygen mask on patient in operation theater of hospital
    Side view of little boy with asthma using inhaler while lying down on sofa at home — Stock Photo
    Side view of little boy with asthma using inhaler while lying down on sofa at home
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Crop unrecognizable loving mother with infrared thermometer measuring temperature of boy breathing in oxygen mask during inhalation procedure and watching cartoon on tablet at home — Stock Photo
    Crop unrecognizable loving mother with infrared thermometer measuring temperature of boy breathing in oxygen mask during inhalation procedure and watching cartoon on tablet at home
    Group of surgeons performing operation in operation room at hospital — Stock Photo
    Group of surgeons performing operation in operation room at hospital
    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
    Closeup of anonymous female patient using pulseoximeter to measure level of oxygen in blood while putting device on finger in room — Stock Photo
    Closeup of anonymous female patient using pulseoximeter to measure level of oxygen in blood while putting device on finger in room
    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
    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
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    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.
    Scuba diver at Joe's Wall Dive Site, Belize Barrier Reef; Belize — Stock Photo
    Scuba diver at Joe's Wall Dive Site, Belize Barrier Reef; Belize
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    Nurse consoling senior patient with doctor in hospital — Stock Photo
    Nurse consoling senior patient with doctor in hospital
    Male patient with nasal cannula, portrait. — Stock Photo
    Male patient with nasal cannula, portrait.
    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
    Nurse putting oxygen mask on patient in hospital — Stock Photo
    Nurse putting oxygen mask on patient in hospital
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Cancer cells with blood vessel formation — Stock Photo
    Cancer cells with blood vessel formation
    Doctor examining pregnant woman during delivery in operating room — Stock Photo
    Doctor examining pregnant woman during delivery 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
    Side view of surgeon comforting pregnant woman during labor in operation theater at hospital — Stock Photo
    Side view of surgeon comforting pregnant woman during labor in operation theater at hospital
    Man Standing Contempling Mountain Landscape. ARGENTINA — Stock Photo
    Man Standing Contempling Mountain Landscape. ARGENTINA
    Side view of professional male aviator in oxygen mask turning switch on control console while operating contemporary aircraft during flight — Stock Photo
    Side view of professional male aviator in oxygen mask turning switch on control console while operating contemporary aircraft during flight
    High angle view of thoughtful mixed-race female patient relaxing in bed in the ward at hospital — Stock Photo
    High angle view of thoughtful mixed-race female patient relaxing in bed in the ward at hospital
    Crenated red blood cells — Stock Photo
    Crenated red blood cells
    Red blood cells — Stock Photo
    Red blood cells
    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
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    Measuring oxygen levels in blood with pulse oximeter. — Stock Photo
    Measuring oxygen levels in blood with pulse oximeter.
    African american senior woman sitting on wheelchair with oxygen mask and looking through window. healthcare and lifestyle during covid 19 pandemic. — Stock Photo
    African american senior woman sitting on wheelchair with oxygen mask and looking through window. healthcare and lifestyle during covid 19 pandemic.
    Using pulse oximeter at home to test oxygen level in blood. — Stock Photo
    Using pulse oximeter at home to test oxygen level in blood.
    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
    Female nurse holding oxygen mask over male patient's mouth in intensive care unit — Stock Photo
    Female nurse holding oxygen mask over male patient's mouth in intensive care unit
    Female doctor wearing mask while anesthetizing elderly patient in surgery — Stock Photo
    Female doctor wearing mask while anesthetizing elderly patient in surgery
    Vicuna (Vicugna vicugna) in the Altiplano of Argentina near Tolar Grande. — Stock Photo
    Vicuna (Vicugna vicugna) in the Altiplano of Argentina near Tolar Grande.
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    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
    Chicken eggshell cross section — Stock Photo
    Chicken eggshell cross section
    Pulse oximeter, blood oxygen saturation monitor. — Stock Photo
    Pulse oximeter, blood oxygen saturation monitor.
    Anesthesiologist holding oxygen mask over patient during surgery — Stock Photo
    Anesthesiologist holding oxygen mask over patient during surgery
    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. 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
    Measuring oxygen levels in blood with pulse oximeter. — Stock Photo
    Measuring oxygen levels in blood with pulse oximeter.
    Front view of diverse female doctors interacting with mature mixed-race female patient in the ward at hospital. Female patient is looking happy. — Stock Photo
    Front view of diverse female doctors interacting with mature mixed-race female patient in the ward at hospital. Female patient is looking happy.