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    Female patient with nasal cannula. — Stock Photo
    Female patient with nasal cannula.
    Male patient with nasal cannula, portrait. — Stock Photo
    Male patient with nasal cannula, portrait.
    Young woman with resuscitation mask and male hand. — Stock Photo
    Young woman with resuscitation mask and male hand.
    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
    Patient with oxygen mask in an operating room — Stock Photo
    Patient with oxygen mask in an operating room
    Patient with oxygen mask in operating room — Stock Photo
    Patient with oxygen mask in operating room
    Female nurse inserting nasal cannula in senior woman. — Stock Photo
    Female nurse inserting nasal cannula in senior woman.
    Female doctor wearing mask while anesthetizing elderly patient in surgery — Stock Photo
    Female doctor wearing mask while anesthetizing elderly patient in surgery
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Medical team examining pregnant woman during delivery in operating room — Stock Photo
    Medical team examining pregnant woman during delivery in operating room
    Strand of beta DNA — Stock Photo
    Strand of beta DNA
    Crenated red blood cells — Stock Photo
    Crenated red blood cells
    Anesthetist holding oxygen mask over patient mouth in operating room — Stock Photo
    Anesthetist holding oxygen mask over patient mouth in operating room
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    Underwater view of diver wearing wetsuit, diving goggles and oxygen cylinder, air bubbles rising. — Stock Photo
    Underwater view of diver wearing wetsuit, diving goggles and oxygen cylinder, air bubbles rising.
    Intensive care unit equipped with monitor corrugated tubes for oxygen and different medical tools in veterinary clinic — Stock Photo
    Intensive care unit equipped with monitor corrugated tubes for oxygen and different medical tools in veterinary clinic
    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
    Colored scanning electron micrograph of red blood cells. — Stock Photo
    Colored scanning electron micrograph of red blood cells.
    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
    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 of mixed race female doctor interacting with Caucasian male patient in the ward at hospital — Stock Photo
    Side view of mixed race female doctor interacting with Caucasian male patient in the ward at hospital
    Scenic view of scuba divers swimming under water — Stock Photo
    Scenic view of scuba divers swimming under water
    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital
    Oxygen mask and tube on white background. — Stock Photo
    Oxygen mask and tube on white background.
    3d illustration of red blood cells erythrocytes, white blood cells leukocytes and platelets thrombocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes, white blood cells leukocytes and platelets thrombocytes.
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Senior woman sleeping with nasal cannula and IV bag, close-up. — Stock Photo
    Senior woman sleeping with nasal cannula and IV bag, close-up.
    Doctor hand putting oxygen mask on patient in hospital — Stock Photo
    Doctor hand putting oxygen mask on patient in hospital
    Philippines, Boracay Island. White Beach. — Stock Photo
    Philippines, Boracay Island. White Beach.
    Close up of thoughtful mixed race female patient relaxing in bed in the ward at hospital — Stock Photo
    Close up of thoughtful mixed race female patient relaxing in bed in the ward at hospital
    Measuring oxygen levels in blood with pulse oximeter. — Stock Photo
    Measuring oxygen levels in blood with pulse oximeter.
    Scuba divers in Roatan Marine Park, West End Wall dive site; Roatan, Honduras — Stock Photo
    Scuba divers in Roatan Marine Park, West End Wall dive site; Roatan, Honduras
    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 rapids in a mountain river with long exposure effect — Stock Photo
    Close up of rapids in a mountain river with long exposure effect
    Cardiovascular system transporting nutrients and oxygen — Stock Photo
    Cardiovascular system transporting nutrients and oxygen
    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
    Close up of a person putting a pulse oximeter on their finger. — Stock Photo
    Close up of a person putting a pulse oximeter on their finger.
    Blood oxygen monitor on finger of patient in intensive care ward, close-up. — Stock Photo
    Blood oxygen monitor on finger of patient in intensive care ward, close-up.
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    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
    Side view of crop female vet with coworker in uniform standing at medical table with cat and tools during surgery — Stock Photo
    Side view of crop female vet with coworker in uniform standing at medical table with cat and tools during surgery
    Adult man picking mushrooms, summer in the forest — Stock Photo
    Adult man picking mushrooms, summer in the forest
    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
    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.
    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
    Surgeon reaching for surgical scissors in operating room — Stock Photo
    Surgeon reaching for surgical scissors in operating room
    Caring woman using pulse oximeter on finger of ill boy in oxygen mask using nebulizer during inhalation at home — Stock Photo
    Caring woman using pulse oximeter on finger of ill boy in oxygen mask using nebulizer during inhalation at home
    Top view of crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood — Stock Photo
    Top view of crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood
    Anesthesiologist holding oxygen mask over patient's face in operating theater — Stock Photo
    Anesthesiologist holding oxygen mask over patient's face in operating theater
    Doctor and paramedics examining a patient in emergency room at hospital — Stock Photo
    Doctor and paramedics examining a patient in emergency room at 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
    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
    Scenic view of scuba diver swimming under water — Stock Photo
    Scenic view of scuba diver swimming under water
    Athlete riding an exercise bike — Stock Photo
    Athlete riding an exercise bike
    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
    Side view of Caucasian male patient sleeping with his hand on chest in bed in the ward at hospital — Stock Photo
    Side view of Caucasian male patient sleeping with his hand on chest in bed in the ward at hospital
    Close-up of patient with oxygen mask in operating room — Stock Photo
    Close-up of patient with oxygen mask in operating room
    Group of surgeons performing operation in operation theater of hospital — Stock Photo
    Group of surgeons performing operation in operation theater of hospital
    Doctor putting on woman resuscitation mask. — Stock Photo
    Doctor putting on woman resuscitation mask.