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    Female radiologist examining equipment. — Stock Photo
    Female radiologist examining equipment.
    Strand of beta DNA — Stock Photo
    Strand of beta DNA
    Scuba diver swimming under water with cute turtle — Stock Photo
    Scuba diver swimming under water with cute turtle
    Close-up of oxygen cylinder in workshop — Stock Photo
    Close-up of oxygen cylinder in workshop
    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
    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
    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
    Anesthetist holding oxygen mask over patient mouth in operating room — Stock Photo
    Anesthetist holding oxygen mask over patient mouth in operating room
    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 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
    Front view of beautiful mixed race female doctor in hijab giving medicine to mature mixed-race female patient in the ward at hospital — Stock Photo
    Front view of beautiful mixed race female doctor in hijab giving medicine to mature mixed-race female patient in the ward at hospital
    Scenic view of scuba divers swimming under water — Stock Photo
    Scenic view of scuba divers swimming under water
    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.
    Colored scanning electron micrograph of red blood cells. — Stock Photo
    Colored scanning electron micrograph of red blood cells.
    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
    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
    Big white clouds floating on azure sky — Stock Photo
    Big white clouds floating on azure sky
    Anesthesiologist holding oxygen mask over patient's face in operating theater — Stock Photo
    Anesthesiologist holding oxygen mask over patient's face in operating theater
    3d illustration of red blood cells erythrocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes.
    High angle view of beautiful mixed-race female patient sleeping in bed in the ward at hospital. Flowers are standing in vase on cupboard next to bed. — Stock Photo
    High angle view of beautiful mixed-race female patient sleeping in bed in the ward at hospital. Flowers are standing in vase on cupboard next to bed.
    Little kid using inhaler in clinic during check up — Stock Photo
    Little kid using inhaler in clinic during check up
    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
    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
    Anesthesiologist holding oxygen mask over patient?s face in operating room — Stock Photo
    Anesthesiologist holding oxygen mask over patient?s face in operating room
    Surgeon reaching for surgical scissors in operating room — Stock Photo
    Surgeon reaching for surgical scissors in operating room
    Male patient with nasal cannula, portrait. — Stock Photo
    Male patient with nasal cannula, portrait.
    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 using pulse oximeter and smart phone, measuring oxygen saturation. — Stock Photo
    Senior woman using pulse oximeter and smart phone, measuring oxygen saturation.
    Scenic view of scuba divers silhouettes swimming under water — Stock Photo
    Scenic view of scuba divers silhouettes swimming under water
    Anesthesiologist holding oxygen mask over patients face in operating room — Stock Photo
    Anesthesiologist holding oxygen mask over patients face in operating room
    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital
    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
    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
    Loving mother with infrared thermometer measuring temperature of boy breathing in oxygen mask during inhalation procedure and watching cartoon on tablet at home
    Red blood cells aggregated — Stock Photo
    Red blood cells aggregated
    Front view of mixed race female doctor interacting with Caucasian male patient in the ward at hospital — Stock Photo
    Front view of mixed race female doctor interacting with Caucasian male patient 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
    White engine of aircraft in azure heaven — Stock Photo
    White engine of aircraft in azure heaven
    Team of surgeons with scalpel are operation together on background of surgical lamp,Point of view shot. — Stock Photo
    Team of surgeons with scalpel are operation together on background of surgical lamp,Point of view shot.
    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
    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
    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
    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
    Astrocyte glial nerve cell, digital illustration. — Stock Photo
    Astrocyte glial nerve cell, digital illustration.
    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital
    Astrocyte glial nerve cell, digital illustration. — Stock Photo
    Astrocyte glial nerve cell, digital illustration.
    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
    Image of firefighter next to the water truck — Stock Photo
    Image of firefighter next to the water truck
    Patient with oxygen mask in operating room — Stock Photo
    Patient with oxygen mask in operating room
    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
    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
    Doctor, nurse and paramedics examining patient on stretcher — Stock Photo
    Doctor, nurse and paramedics examining patient on stretcher
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Nurse putting oxygen mask on patient in hospital — Stock Photo
    Nurse putting oxygen mask on patient 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
    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
    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital
    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.
    Scenic view of scuba divers swimming under water with fishes — Stock Photo
    Scenic view of scuba divers swimming under water with fishes
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    Side view of mature mixed-race female patient sleeping in bed in the ward at hospital — Stock Photo
    Side view of mature mixed-race female patient sleeping in bed in the ward at hospital