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    Close-up of doctor holding prepared antibodies syringe. — Stock Photo
    Close-up of doctor holding prepared antibodies syringe.
    Senior woman doing a mailed DNA test at home. — Stock Photo
    Senior woman doing a mailed DNA test at home.
    Female scientist holding tube with blood sample. — Stock Photo
    Female scientist holding tube with blood sample.
    Portrait happy, confident young man holding learner permit — Stock Photo
    Portrait happy, confident young man holding learner permit
    Plant seedling in soil in Petri dish in laboratory. — Stock Photo
    Plant seedling in soil in Petri dish in laboratory.
    Crop anonymous scientist in disposable gloves with liquid in small transparent bottle working in laboratory — Stock Photo
    Crop anonymous scientist in disposable gloves with liquid in small transparent bottle working in laboratory
    Quartz cuvettes containing red liquid. — Stock Photo
    Quartz cuvettes containing red liquid.
    Car dealer helping man with test drive — Stock Photo
    Car dealer helping man with test drive
    Scientist checking a solution in conical flask at lab — Stock Photo
    Scientist checking a solution in conical flask at lab
    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
    Lab technician removing sample vial cap — Stock Photo
    Lab technician removing sample vial cap
    Mother helping son test blood sugar — Stock Photo
    Mother helping son test blood sugar
    Female biologist in white coat pouring water into test tube with dissolved samples of soil in laboratory. — Stock Photo
    Female biologist in white coat pouring water into test tube with dissolved samples of soil in laboratory.
    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.
    Water department technician reinstalling caps on fire hydrant — Stock Photo
    Water department technician reinstalling caps on fire hydrant
    Woman sitting on sofa and looking down at pregnancy test. — Stock Photo
    Woman sitting on sofa and looking down at pregnancy test.
    Hand of doctor using medical tonometer in front of blurred x-ray image — Stock Photo
    Hand of doctor using medical tonometer in front of blurred x-ray image
    Close-up of male scientist experimenting in laboratory — Stock Photo
    Close-up of male scientist experimenting in laboratory
    Modern vision test equipment and chair against white wall in optician office in clinic — Stock Photo
    Modern vision test equipment and chair against white wall in optician office in clinic
    Researcher preparing samples of donated blood for analysis. — Stock Photo
    Researcher preparing samples of donated blood for analysis.
    Side view of a specialist using a digital multimeter to check the correct voltage of an electric scooter in a specialist workshop. — Stock Photo
    Side view of a specialist using a digital multimeter to check the correct voltage of an electric scooter in a specialist workshop.
    Attentive university student doing a chemical experiment in laboratory — Stock Photo
    Attentive university student doing a chemical experiment in laboratory
    Little boy coloring shapes with colorful pens for developmental psychology test in psychologist office. — Stock Photo
    Little boy coloring shapes with colorful pens for developmental psychology test in psychologist office.
    Close-up of a doctor putting a PCR test swab into a tube — Stock Photo
    Close-up of a doctor putting a PCR test swab into a tube
    Microbiological research, illustration. Multi-channel pipette and multi-well plates in microbiology lab — Stock Photo
    Microbiological research, illustration. Multi-channel pipette and multi-well plates in microbiology lab
    Close-up of female patient receiving a ultrasound scan on the neck — Stock Photo
    Close-up of female patient receiving a ultrasound scan on the neck
    Female scientists in face masks working in laboratory — Stock Photo
    Female scientists in face masks working in laboratory
    Male patient receiving a ultrasound scan on the chest — Stock Photo
    Male patient receiving a ultrasound scan on the chest
    Optician testing senior man eyesight. — Stock Photo
    Optician testing senior man eyesight.
    Pipetting liquid into test tubes, close-up. — Stock Photo
    Pipetting liquid into test tubes, close-up.
    Male college student taking test at desk in classroom — Stock Photo
    Male college student taking test at desk in classroom
    Close-up of hands of scientist placing slide with human sample under light microscope for medical testing. — Stock Photo
    Close-up of hands of scientist placing slide with human sample under light microscope for medical testing.
    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
    Laboratory technician using refrigerated centrifuge machine in blood bank — Stock Photo
    Laboratory technician using refrigerated centrifuge machine in blood bank
    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
    Optician testing a boy's eyes with optometry devices — Stock Photo
    Optician testing a boy's eyes with optometry devices
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Man having eye test with special equipment. — Stock Photo
    Man having eye test with special equipment.
    Ophthalmologist adjusting eyeglasses to a womans eyes — Stock Photo
    Ophthalmologist adjusting eyeglasses to a womans eyes
    Crop unrecognizable optician using phoropter for eyesight testing of senior male patient in clinic — Stock Photo
    Crop unrecognizable optician using phoropter for eyesight testing of senior male patient in clinic
    Female forensic scientist examining fingerprints. — Stock Photo
    Female forensic scientist examining fingerprints.
    Close-up of immunologist performing skin prick allergy testing on boy. — Stock Photo
    Close-up of immunologist performing skin prick allergy testing on boy.
    Chinese woman sitting in car and holding steering wheel — Stock Photo
    Chinese woman sitting in car and holding steering wheel
    Laboratory technician analyzing chemical solution in blood bank — Stock Photo
    Laboratory technician analyzing chemical solution in blood bank
    Gloved hand of laboratory assistant examining growth in petri dish, close-up. — Stock Photo
    Gloved hand of laboratory assistant examining growth in petri dish, close-up.
    Close-up of test tube in rack at blood bank — Stock Photo
    Close-up of test tube in rack at blood bank
    Ophthalmologist using auto refractometer eye examination equipment on boy in clinic. — Stock Photo
    Ophthalmologist using auto refractometer eye examination equipment on boy in clinic.
    Centrifuging blood samples in barcoded test tubes, digital illustration. — Stock Photo
    Centrifuging blood samples in barcoded test tubes, digital illustration.
    Measuring blood pressure and using smart phone to follow results. — Stock Photo
    Measuring blood pressure and using smart phone to follow results.
    Optician testing a boy's eyes with optometry devices — Stock Photo
    Optician testing a boy's eyes with optometry devices
    Senior woman using pulse oximeter and smart phone, measuring oxygen saturation. — Stock Photo
    Senior woman using pulse oximeter and smart phone, measuring oxygen saturation.
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Pollution control inspector taking sample of mud in field by lake. — Stock Photo
    Pollution control inspector taking sample of mud in field by lake.
    France, Arcachon Bay, sea at high tide — Stock Photo
    France, Arcachon Bay, sea at high tide
    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
    Tangled computer server cords in server room — Stock Photo
    Tangled computer server cords in server room
    Blood test kit and and analysis results — Stock Photo
    Blood test kit and and analysis results
    Portrait confident young man with learners permit leaning against car — Stock Photo
    Portrait confident young man with learners permit leaning against car
    Close-up of human blood and various medical samples in test tubes while screening in medical lab. — Stock Photo
    Close-up of human blood and various medical samples in test tubes while screening in medical lab.
    Blood samples in microcentrifuge tube strip for genetic analysis. — Stock Photo
    Blood samples in microcentrifuge tube strip for genetic analysis.