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    Preteen girl breathing into peak flow meter and looking in camera. — Stock Photo
    Preteen girl breathing into peak flow meter and looking in camera.
    Attentive university students doing a chemical experiment in laboratory — Stock Photo
    Attentive university students doing a chemical experiment in laboratory
    Attentive university students doing a experiment in laboratory — Stock Photo
    Attentive university students doing a experiment in laboratory
    Close-up shot of doctor examining belly of pregnant woman with ultrasound — Stock Photo
    Close-up shot of doctor examining belly of pregnant woman with ultrasound
    Confident scientist man with arms crossed standing outside laboratory. — Stock Photo
    Confident scientist man with arms crossed standing outside laboratory.
    Dentist looking at x-ray image — Stock Photo
    Dentist looking at x-ray image
    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
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    Close-up of pipette pipetting into test tubes in pathogenic laboratory. — Stock Photo
    Close-up of pipette pipetting into test tubes in pathogenic laboratory.
    Crop concentrated female scientist in white robe and gloves conducting chemical experiment with substance and syringe while working in modern laboratory — Stock Photo
    Crop concentrated female scientist in white robe and gloves conducting chemical experiment with substance and syringe while working in modern laboratory
    Scientist pouring chemical solution on test tube from bottle in lab — Stock Photo
    Scientist pouring chemical solution on test tube from bottle in lab
    Close-up of laboratory technician working in blood bank — Stock Photo
    Close-up of laboratory technician working in blood bank
    Cropped view of scientist holding sample for analytical testing. — Stock Photo
    Cropped view of scientist holding sample for analytical testing.
    Girl having eye test in clinic with doctor. — Stock Photo
    Girl having eye test in clinic with doctor.
    Man testing temperature of beer in wort while making beer at home brewery — Stock Photo
    Man testing temperature of beer in wort while making beer at home brewery
    Stacked agar plates with microbiological cultures on plain background. — Stock Photo
    Stacked agar plates with microbiological cultures on plain background.
    Closeup view of scientist analyzing bacterial colonies — Stock Photo
    Closeup view of scientist analyzing bacterial colonies
    Female medic in mask collecting blood from arm of male patient sitting in medical chair in modern clinic — Stock Photo
    Female medic in mask collecting blood from arm of male patient sitting in medical chair in modern clinic
    Scientist pipetting sample into vial in laboratory. — Stock Photo
    Scientist pipetting sample into vial in laboratory.
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes. — Stock Photo
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes.
    Blood test kit and and analysis results — Stock Photo
    Blood test kit and and analysis results
    Close-up of male scientist experimenting in laboratory — Stock Photo
    Close-up of male scientist experimenting in laboratory
    DNA researcher pipetting into tube with reference in background. — Stock Photo
    DNA researcher pipetting into tube with reference in background.
    Close-up view of vacutainer with needle on tray. — Stock Photo
    Close-up view of vacutainer with needle on tray.
    Urine sample in container for analysis, studio shot. — Stock Photo
    Urine sample in container for analysis, studio shot.
    Preschooler boy coloring shapes with colorful pens for developmental psychology test in psychologist office. — Stock Photo
    Preschooler boy coloring shapes with colorful pens for developmental psychology test in psychologist office.
    Senior man with diabetes using blood glucose meter on finger — Stock Photo
    Senior man with diabetes using blood glucose meter on finger
    Smiling female science teacher and girl student reading textbook at microscope in laboratory classroom — Stock Photo
    Smiling female science teacher and girl student reading textbook at microscope in laboratory classroom
    Female radiologist studying CT scans on monitors. — Stock Photo
    Female radiologist studying CT scans on monitors.
    Optometrist adjusting the retinograph during study of the eyesight of a black woman — Stock Photo
    Optometrist adjusting the retinograph during study of the eyesight of a black woman
    Male scientists experimenting together in laboratory — Stock Photo
    Male scientists experimenting together in laboratory
    Urine sample in tube on surgical tray. — Stock Photo
    Urine sample in tube on surgical tray.
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Stacked agar plates with microbiological cultures on plain background. — Stock Photo
    Stacked agar plates with microbiological cultures on plain background.
    Attentive female scientist experimenting in laboratory — Stock Photo
    Attentive female scientist experimenting in laboratory
    Female scientist holding medical samples in lab — Stock Photo
    Female scientist holding medical samples in lab
    Three blue single-use masks for virus protection on yellow background — Stock Photo
    Three blue single-use masks for virus protection on yellow background
    Girl student using microscope, conducting scientific experiment in laboratory classroom — Stock Photo
    Girl student using microscope, conducting scientific experiment in laboratory classroom
    Close-up of doctor holding cardio monitor — Stock Photo
    Close-up of doctor holding cardio monitor
    Woman in a black swimsuit — Stock Photo
    Woman in a black swimsuit
    Female biologist pouring water into test tube with dissolved samples of soil in laboratory. — Stock Photo
    Female biologist pouring water into test tube with dissolved samples of soil in laboratory.
    Group of laboratory test tubes. — Stock Photo
    Group of laboratory test tubes.
    Female teacher and students conducting chemical experiment — Stock Photo
    Female teacher and students conducting chemical experiment
    African American male in uniform with stethoscope showing blurred vaccine in hand in hospital — Stock Photo
    African American male in uniform with stethoscope showing blurred vaccine in hand in hospital
    Green seedlings in test tubes, close-up. — Stock Photo
    Green seedlings in test tubes, close-up.
    Embryo selection for IVF — Stock Photo
    Embryo selection for IVF
    Ophthalmologist placing phoropter in front of a female patient — Stock Photo
    Ophthalmologist placing phoropter in front of a female patient
    Organic soil certification inspector marking sample. — Stock Photo
    Organic soil certification inspector marking sample.
    Optician testing a boy's eyes with optometry devices — Stock Photo
    Optician testing a boy's eyes with optometry devices
    Boy wearing headphones as playing with building blocks while hearing test, female doctor in background. — Stock Photo
    Boy wearing headphones as playing with building blocks while hearing test, female doctor in background.
    Optician testing senior man eyesight. — Stock Photo
    Optician testing senior man eyesight.
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Optician testing a girl's eyes with optometry devices — Stock Photo
    Optician testing a girl's eyes with optometry devices
    Graduated pipette and test tubes — Stock Photo
    Graduated pipette and test tubes
    Pipette placing sample into test tube during experiment in laboratory. — Stock Photo
    Pipette placing sample into test tube during experiment in laboratory.
    Female scientist using pipette in laboratory — Stock Photo
    Female scientist using pipette in laboratory
    Close-up of dentist drilling boy teeth in clinic. — Stock Photo
    Close-up of dentist drilling boy teeth in clinic.
    Petri dishes for DNA sequencing, close-up. — Stock Photo
    Petri dishes for DNA sequencing, close-up.
    Dentist extracting a tooth in his office — Stock Photo
    Dentist extracting a tooth in his office
    Close-up of pipetting sample into multiwell plate for analysis in laboratory. — Stock Photo
    Close-up of pipetting sample into multiwell plate for analysis in laboratory.