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    Anesthesiologist holding oxygen mask over patient during surgery — Stock Photo
    Anesthesiologist holding oxygen mask over patient during surgery
    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 pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at 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
    Anesthesiologist holding oxygen mask over patients face in operating room — Stock Photo
    Anesthesiologist holding oxygen mask over patients face in operating room
    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
    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
    Nurse giving oxygen to newborn baby. — Stock Photo
    Nurse giving oxygen to newborn baby.
    Group of surgeons performing operation in operation theater of hospital — Stock Photo
    Group of surgeons performing operation in operation theater of hospital
    Paramedic giving oxygen to injured woman at accident spot — Stock Photo
    Paramedic giving oxygen to injured woman at accident spot
    African american senior woman sitting on wheelchair with oxygen mask at home. healthcare and lifestyle during covid 19 pandemic. — Stock Photo
    African american senior woman sitting on wheelchair with oxygen mask at home. healthcare and lifestyle during covid 19 pandemic.
    Female doctor putting oxygen mask on patient face in the hospital — Stock Photo
    Female doctor putting oxygen mask on patient face in the hospital
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    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.
    Side view of Caucasian male patients sleeping on bed in the ward at hospital — Stock Photo
    Side view of Caucasian male patients sleeping on bed in the ward at hospital
    Athlete in oxygen mask riding exercise bike with measuring of oxygen consumption. — Stock Photo
    Athlete in oxygen mask riding exercise bike with measuring of oxygen consumption.
    Side view of diverse male patients interacting with each other while relaxing on the bed in the ward at hospital. — Stock Photo
    Side view of diverse male patients interacting with each other while relaxing on the bed in the ward 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
    Boy home schooling with a medical mask on to protect from a virus — Stock Photo
    Boy home schooling with a medical mask on to protect from a virus
    Nurse putting oxygen mask on patient in hospital — Stock Photo
    Nurse putting oxygen mask on patient in hospital
    Measuring oxygen saturation in blood with pulse oximeter. — Stock Photo
    Measuring oxygen saturation in blood with pulse oximeter.
    Doctor, nurse and paramedics examining patient on stretcher — Stock Photo
    Doctor, nurse and paramedics examining patient on stretcher
    Doctor practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctor practicing bag-valve-mask ventilation on training dummy.
    Senior woman sleeping with nasal cannula and IV bag, close-up. — Stock Photo
    Senior woman sleeping with nasal cannula and IV bag, close-up.
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Surgeons performing operation in operation theater of hospital — Stock Photo
    Surgeons performing operation in operation theater of hospital
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Ward boy pushing senior patient on stretcher in hospital corridor — Stock Photo
    Ward boy pushing senior patient on stretcher in hospital corridor
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    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
    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
    Female doctor wearing surgical clothing anesthetizing patient in operating theater — Stock Photo
    Female doctor wearing surgical clothing anesthetizing patient in operating theater
    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
    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
    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
    Unrecognizable medic putting on mask on face of patient while preparing for cardiac stress test in modern hospital — Stock Photo
    Unrecognizable medic putting on mask on face of patient while preparing for cardiac stress test in modern hospital
    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
    Over the shoulder view of mixed race female doctor in hijab consoling beautiful mixed-race female patient in the ward at hospital. They are holding hands. — Stock Photo
    Over the shoulder view of mixed race female doctor in hijab consoling beautiful mixed-race female patient in the ward at hospital. They are holding hands.
    Red blood cells and white blood cells — Stock Photo
    Red blood cells and white blood cells
    Adult man picking mushrooms, summer in the forest — Stock Photo
    Adult man picking mushrooms, summer in the forest
    Team of doctors putting oxygen mask on patient face in the hospital — Stock Photo
    Team of doctors putting oxygen mask on patient face in the hospital
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    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
    Scuba diver swimming under water with cute turtle — Stock Photo
    Scuba diver swimming under water with cute turtle
    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
    Young boy sitting and inhaling through a oxygen mask at home. — Stock Photo
    Young boy sitting and inhaling through a oxygen mask at home.
    Pilot in mask operating airplane during flight — Stock Photo
    Pilot in mask operating airplane during flight
    Chicken eggshell cross section — Stock Photo
    Chicken eggshell cross section
    Scuba diver at the Three Amigos Dive Site, Belize Barrier Reef; Belize — Stock Photo
    Scuba diver at the Three Amigos Dive Site, Belize Barrier Reef; Belize
    Side view of mature Caucasian male patient sleeping in bed while senior mixed-race male patient is sitting in wheelchair next to the window in the ward at hospital — Stock Photo
    Side view of mature Caucasian male patient sleeping in bed while senior mixed-race male patient is sitting in wheelchair next to the window in the ward 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
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Surgeons adjusting oxygen mask on patient in operation theater of hospital — Stock Photo
    Surgeons adjusting oxygen mask on patient in operation theater of 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
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    Astrocyte glial nerve cell, digital illustration. — Stock Photo
    Astrocyte glial nerve cell, digital illustration.
    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