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    Close-up of pipetting colorful liquids into test tubes. — Stock Photo
    Close-up of pipetting colorful liquids into test tubes.
    Chinese woman taking test drive with car dealer assistance — Stock Photo
    Chinese woman taking test drive with car dealer assistance
    Medical stethoscope near tonometer, scissors, tweezers and pen on wooden table — Stock Photo
    Medical stethoscope near tonometer, scissors, tweezers and pen on wooden table
    DNA home test kit. — Stock Photo
    DNA home test kit.
    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.
    Woman dipping her hand in a river, Bulgaria — Stock Photo
    Woman dipping her hand in a river, Bulgaria
    Side view of female mechanic in googles using screwdriver to fix compressor engine — Stock Photo
    Side view of female mechanic in googles using screwdriver to fix compressor engine
    Side view of woman in medical uniform and mask using modern microscope to examine human cells while working in lab of modern clinic — Stock Photo
    Side view of woman in medical uniform and mask using modern microscope to examine human cells while working in lab of modern clinic
    Caucasian female doctor wearing face mask taking swab test from female patient at home. medical and healthcare services home visiting during coronavirus covid 19 pandemic. — Stock Photo
    Caucasian female doctor wearing face mask taking swab test from female patient at home. medical and healthcare services home visiting during coronavirus covid 19 pandemic.
    Laboratory technician holding test tubes in blood bank — Stock Photo
    Laboratory technician holding test tubes in blood bank
    Collage of masks for protection factor KN95 on a blue background zenith view — Stock Photo
    Collage of masks for protection factor KN95 on a blue background zenith view
    Ophthalmologist examining female patient with slit lamp in clinic. — Stock Photo
    Ophthalmologist examining female patient with slit lamp in clinic.
    Technician holding blood, urine and chemistry samples for clinical testing in gloved hand. — Stock Photo
    Technician holding blood, urine and chemistry samples for clinical testing in gloved hand.
    Boy coloring shapes with colorful pens for developmental psychology test in female doctor office. — Stock Photo
    Boy coloring shapes with colorful pens for developmental psychology test in female doctor office.
    Petri dishes with blood agar stacked on blue background. — Stock Photo
    Petri dishes with blood agar stacked on blue background.
    Scientist viewing medical sample on glass slide under microscope in laboratory. — Stock Photo
    Scientist viewing medical sample on glass slide under microscope in laboratory.
    Crop anonymous competent researcher in white robe latex gloves and face mask working in modern laboratory and standing near table with assorted glassware including graduated cylinders syringes and test tubes — Stock Photo
    Crop anonymous competent researcher in white robe latex gloves and face mask working in modern laboratory and standing near table with assorted glassware including graduated cylinders syringes and test tubes
    Plant seedling in soil in Petri dish in laboratory. — Stock Photo
    Plant seedling in soil in Petri dish in laboratory.
    Stacked agar plates with microbiological cultures on plain background. — Stock Photo
    Stacked agar plates with microbiological cultures on plain background.
    Young asian college students throwing paper in the air — Stock Photo
    Young asian college students throwing paper in the air
    Scientist holding petri dish and syringe. — Stock Photo
    Scientist holding petri dish and syringe.
    Scientist making experiment with steaming flasks — Stock Photo
    Scientist making experiment with steaming flasks
    College students taking test at desks in classroom — Stock Photo
    College students taking test at desks in classroom
    Female doctor performing skin prick allergy testing on boy for possible allergen. — Stock Photo
    Female doctor performing skin prick allergy testing on boy for possible allergen.
    Female scientist holding microscope slide with blood sample. — Stock Photo
    Female scientist holding microscope slide with blood sample.
    Labelled test tubes with blood samples. — Stock Photo
    Labelled test tubes with blood samples.
    Stacked agar plates with microbiological cultures on plain background. — Stock Photo
    Stacked agar plates with microbiological cultures on plain background.
    Pipette adding a solution to a sample — Stock Photo
    Pipette adding a solution to a sample
    Attentive university student doing a chemical experiment in laboratory — Stock Photo
    Attentive university student doing a chemical experiment in laboratory
    Attentive female scientist using pipette in laboratory — Stock Photo
    Attentive female scientist using pipette in laboratory
    Rear view of scientist operating with display on wall — Stock Photo
    Rear view of scientist operating with display on wall
    Preschooler boy undergoing logic test with numbers for developmental psychology test in female psychologist office. — Stock Photo
    Preschooler boy undergoing logic test with numbers for developmental psychology test in female psychologist office.
    Close up of Chemical test strips illuminated by red light — Stock Photo
    Close up of Chemical test strips illuminated by red light
    Crop anonymous vet doctor with syringe taking blood sample from cat during examination in veterinary clinic — Stock Photo
    Crop anonymous vet doctor with syringe taking blood sample from cat during examination in veterinary clinic
    Female dentist taking x-ray of patient teeth at clinic — Stock Photo
    Female dentist taking x-ray of patient teeth at clinic
    Senior woman preparing DNA test kit. — Stock Photo
    Senior woman preparing DNA test kit.
    Woman in a black swimsuit — Stock Photo
    Woman in a black swimsuit
    Male teacher and students conducting scientific experiment in laboratory classroom — Stock Photo
    Male teacher and students conducting scientific experiment in laboratory classroom
    Scientist selecting human blood sample in laboratory. — Stock Photo
    Scientist selecting human blood sample in laboratory.
    DNA samples, autoradiogram and forensic evidence bag on blue background. — Stock Photo
    DNA samples, autoradiogram and forensic evidence bag on blue background.
    Crop male placing vial with chemical sample into electronic medical device for conducting research in laboratory — Stock Photo
    Crop male placing vial with chemical sample into electronic medical device for conducting research in laboratory
    Optometry devices closeup view — Stock Photo
    Optometry devices closeup view
    Woman using a glucometer to take a blood glucose reading. — Stock Photo
    Woman using a glucometer to take a blood glucose reading.
    Stacked agar plates with microbiological cultures on plain background. — Stock Photo
    Stacked agar plates with microbiological cultures on plain background.
    Close-up of laboratory technician holding tube with blood sample in gloved hand. — Stock Photo
    Close-up of laboratory technician holding tube with blood sample in gloved hand.
    Scientist person providing chemistry experiment with flasks in laboratory. — Stock Photo
    Scientist person providing chemistry experiment with flasks in laboratory.
    Close-up of rack of cell cultures in tubes in laboratory. — Stock Photo
    Close-up of rack of cell cultures in tubes in laboratory.
    Male optometrist examining eye test equipment — Stock Photo
    Male optometrist examining eye test equipment
    Scientists experimenting together in laboratory — Stock Photo
    Scientists experimenting together in laboratory
    Scientist with papers standing in storage and doing revision in lab. — Stock Photo
    Scientist with papers standing in storage and doing revision in lab.
    Examining petri dish under microscope. — Stock Photo
    Examining petri dish under microscope.
    Optician testing a boy's eyes with optometry devices — Stock Photo
    Optician testing a boy's eyes with optometry devices
    Female doctor putting headphones on boy having hearing test. — Stock Photo
    Female doctor putting headphones on boy having hearing test.
    Teacher watching curious students playing with beakers at interactive exhibit in science center — Stock Photo
    Teacher watching curious students playing with beakers at interactive exhibit in science center
    Side view of unrecognizable female medic in mask and gloves holding tube with blood sample in modern lab in clinic — Stock Photo
    Side view of unrecognizable female medic in mask and gloves holding tube with blood sample in modern lab in clinic
    Attractive concentrated teenage female student taking notes for exam and drinking hot beverage while sitting on bed — Stock Photo
    Attractive concentrated teenage female student taking notes for exam and drinking hot beverage while sitting on bed
    Optometrist examining patient eyes with phoropter in clinic — Stock Photo
    Optometrist examining patient eyes with phoropter in clinic
    Female scientist holding micro tube with sample in ancient DNA laboratory for ancient DNA analysis. — Stock Photo
    Female scientist holding micro tube with sample in ancient DNA laboratory for ancient DNA analysis.
    High angle of crop anonymous medic taking blood test of patient with medical device in clinic — Stock Photo
    High angle of crop anonymous medic taking blood test of patient with medical device in clinic
    Forensic DNA autoradiogram — Stock Photo
    Forensic DNA autoradiogram