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    Blood sample awaiting testing in laboratory, close-up with selective focus. — Stock Photo
    Blood sample awaiting testing in laboratory, close-up with selective focus.
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Lab technician adding liquid from graduated cylinder to beaker — Stock Photo
    Lab technician adding liquid from graduated cylinder to beaker
    Water treatment engineer in treatment room — Stock Photo
    Water treatment engineer in treatment room
    Lab technician adding reagent to sample while measuring pH — Stock Photo
    Lab technician adding reagent to sample while measuring pH
    Lab technician recording data from sample test — Stock Photo
    Lab technician recording data from sample test
    Microbiologist working with petri dishes and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dishes and test tubes in laboratory.
    Lab technician adding liquid to graduated cylinder — Stock Photo
    Lab technician adding liquid to graduated cylinder
    Microbiologist taking bacterial sample on microscope slide. — Stock Photo
    Microbiologist taking bacterial sample on microscope slide.
    Lab technician igniting Bunsen burner — Stock Photo
    Lab technician igniting Bunsen burner
    Lab technician opening sterilization tank — Stock Photo
    Lab technician opening sterilization tank
    Microbiologist working with petri dish and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dish and test tubes in laboratory.
    Lab technician holding tray of calibrated samples — Stock Photo
    Lab technician holding tray of calibrated samples
    Microbiology technician pouring liquid with bacteria strains in plastic box. — Stock Photo
    Microbiology technician pouring liquid with bacteria strains in plastic box.
    Microbiologist taking bacterial sample on microscope slide. — Stock Photo
    Microbiologist taking bacterial sample on microscope slide.
    Lab technician using flame test probe to gather sample from vile — Stock Photo
    Lab technician using flame test probe to gather sample from vile
    Lab technician removing sample vial cap — Stock Photo
    Lab technician removing sample vial cap
    Lab technician picking up samples — Stock Photo
    Lab technician picking up samples
    Lab technician holding sample in flame — Stock Photo
    Lab technician holding sample in flame
    Microbiologist taking bacterial sample on microscope slide. — Stock Photo
    Microbiologist taking bacterial sample on microscope slide.
    Boy wearing headphones as having hearing test, female doctor putting hand on kid shoulder. — Stock Photo
    Boy wearing headphones as having hearing test, female doctor putting hand on kid shoulder.
    Engineer walking by water treatment plant ultraviolet ionization treatment room — Stock Photo
    Engineer walking by water treatment plant ultraviolet ionization treatment room
    Microbiologist working with petri dish and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dish and test tubes in laboratory.
    Boy having a hearing test in an audiologist's office. — Stock Photo
    Boy having a hearing test in an audiologist's office.
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Water treatment plant ultraviolet ionization treatment room — Stock Photo
    Water treatment plant ultraviolet ionization treatment room
    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 engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Lab technician collecting data on sterilization — Stock Photo
    Lab technician collecting data on sterilization
    Microbiology technician working with bacteria strains in petri dish. — Stock Photo
    Microbiology technician working with bacteria strains in petri dish.
    Microbiologist working with petri dishes and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dishes and test tubes 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.
    Microbiologist pipetting into petri dish in laboratory. — Stock Photo
    Microbiologist pipetting into petri dish in laboratory.
    Microbiologist working with petri dish and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dish and test tubes in laboratory.
    Microbiology technician working with bacteria strains in plastic box. — Stock Photo
    Microbiology technician working with bacteria strains in plastic box.
    Female microbiologist pipetting into petri dishes in laboratory. — Stock Photo
    Female microbiologist pipetting into petri dishes in laboratory.
    Female doctor putting headphones on boy having hearing test. — Stock Photo
    Female doctor putting headphones on boy having hearing test.
    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.
    Boy in headphones having hearing test in audiology room. — Stock Photo
    Boy in headphones having hearing test in audiology room.
    Female doctor putting headphones on boy having hearing test. — Stock Photo
    Female doctor putting headphones on boy having hearing test.
    Female doctor putting headphones on boy having hearing test. — Stock Photo
    Female doctor putting headphones on boy having hearing test.
    Boy having hearing test in female audiologist office. — Stock Photo
    Boy having hearing test in female audiologist office.
    Boy wearing headphones as playing with building blocks while hearing test with female taking notes. — Stock Photo
    Boy wearing headphones as playing with building blocks while hearing test with female taking notes.
    Female audiologist putting headphones on boy having hearing test. — Stock Photo
    Female audiologist putting headphones on boy having hearing test.
    Patient having electrodes attached to legs by physician for electromyography nerve conduction test. — Stock Photo
    Patient having electrodes attached to legs by physician for electromyography nerve conduction test.
    Cropped shot of hands of woman testing cholesterol. — Stock Photo
    Cropped shot of hands of woman testing cholesterol.
    Cropped shot of hands of woman testing cholesterol. — Stock Photo
    Cropped shot of hands of woman testing cholesterol.
    Modern digital mammography unit at clinic — Stock Photo
    Modern digital mammography unit at clinic
    Modern special equipment using for mammography — Stock Photo
    Modern special equipment using for mammography
    Tangled computer server cords in server room — Stock Photo
    Tangled computer server cords in server room
    Modern digital mammography unit at clinic — Stock Photo
    Modern digital mammography unit at clinic
    Close-up of hands of mature woman using paper strip to test blood glucose. — Stock Photo
    Close-up of hands of mature woman using paper strip to test blood glucose.
    Modern digital mammography unit at clinic and screen — Stock Photo
    Modern digital mammography unit at clinic and screen
    Mature woman testing blood pressure with machine. — Stock Photo
    Mature woman testing blood pressure with machine.
    Close-up of hand of mature woman testing blood pressure with machine. — Stock Photo
    Close-up of hand of mature woman testing blood pressure with machine.
    Close-up of hands of mature woman using paper strip to test blood glucose. — Stock Photo
    Close-up of hands of mature woman using paper strip to test blood glucose.
    Mature woman testing blood pressure with machine. — Stock Photo
    Mature woman testing blood pressure with machine.
    Little girl having finger prick test in medical clinic. — Stock Photo
    Little girl having finger prick test in medical clinic.
    Close-up of hands of mature woman testing blood glucose with finger prick test. — Stock Photo
    Close-up of hands of mature woman testing blood glucose with finger prick test.
    Woman undergoing ophthalmology visual field testing with A-scan ultrasound biometry. — Stock Photo
    Woman undergoing ophthalmology visual field testing with A-scan ultrasound biometry.