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    Technician holding urine sample for testing in laboratory. — Stock Photo
    Technician holding urine sample for testing in laboratory.
    Scientist viewing medical sample on glass slide under microscope in laboratory. — Stock Photo
    Scientist viewing medical sample on glass slide under microscope in laboratory.
    Medical samples — Stock Photo
    Medical samples
    Variety of potential drugs in petri dish on DNA autoradiogram. — Stock Photo
    Variety of potential drugs in petri dish on DNA autoradiogram.
    Pills in a Petri dish — Stock Photo
    Pills in a Petri dish
    Laboratory worker pipetting liquid into microcentrifuge tube. — Stock Photo
    Laboratory worker pipetting liquid into microcentrifuge tube.
    Microbiologist working with petri dish and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dish and test tubes in laboratory.
    Hand of technician holding hepatitis sample for testing in laboratory. — Stock Photo
    Hand of technician holding hepatitis sample for testing in laboratory.
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus — Stock Photo
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus
    Scientist selecting human blood sample in laboratory. — Stock Photo
    Scientist selecting human blood sample in laboratory.
    Microbiology technician working with bacteria strains in petri dish. — Stock Photo
    Microbiology technician working with bacteria strains in petri dish.
    Scientists preparing blood sample for analysis under light microscope. — Stock Photo
    Scientists preparing blood sample for analysis under light microscope.
    Close-up of rack of sample tubes with blood for analysis. — Stock Photo
    Close-up of rack of sample tubes with blood for analysis.
    Vial of potential drug in petri dish on DNA autoradiogram. — Stock Photo
    Vial of potential drug in petri dish on DNA autoradiogram.
    Pipette placing sample into test tube during experiment in laboratory. — Stock Photo
    Pipette placing sample into test tube during experiment in laboratory.
    Drug research and clinical testing — Stock Photo
    Drug research and clinical testing
    Pills in a Petri dish — Stock Photo
    Pills in a Petri dish
    Pipetting samples into microcentrifuge tubes — Stock Photo
    Pipetting samples into microcentrifuge tubes
    Medical worker gloved hands holding test stick in urine sample tube. — Stock Photo
    Medical worker gloved hands holding test stick in urine sample tube.
    Scientist holding syringe over variety of pharmaceutical vials. — Stock Photo
    Scientist holding syringe over variety of pharmaceutical vials.
    Female microbiologist pipetting into petri dishes in laboratory. — Stock Photo
    Female microbiologist pipetting into petri dishes in laboratory.
    Blood sampling vacutainer tubes in rack, close-up. — Stock Photo
    Blood sampling vacutainer tubes in rack, close-up.
    Pool of blood in watch glass with syringe. — Stock Photo
    Pool of blood in watch glass with syringe.
    Doctor preparing HIV test sample for testing in laboratory. — Stock Photo
    Doctor preparing HIV test sample for testing in laboratory.
    Microbiologist working with petri dishes and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dishes and test tubes in laboratory.
    Scientist viewing multi well plate containing samples for testing in laboratory. — Stock Photo
    Scientist viewing multi well plate containing samples for testing in laboratory.
    Pipette placing sample into test tube during experiment in laboratory. — Stock Photo
    Pipette placing sample into test tube during experiment in laboratory.
    Preteen girl breathing into peak flow meter and looking in camera. — Stock Photo
    Preteen girl breathing into peak flow meter and looking in camera.
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Pipette adding a solution to a sample — Stock Photo
    Pipette adding a solution to a sample
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus — Stock Photo
    Pharmaceutical research. Potential new medicines and vaccines on electron micrograph of virus
    Microbiologist working with petri dishes and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dishes and test tubes in laboratory.
    Microbiologist taking bacterial sample on microscope slide. — Stock Photo
    Microbiologist taking bacterial sample on microscope slide.
    Microbiology technician working with bacteria strains in plastic box. — Stock Photo
    Microbiology technician working with bacteria strains in plastic box.
    Scientists preparing multiwell plate with blood samples for testing and analysis. — Stock Photo
    Scientists preparing multiwell plate with blood samples for testing and analysis.
    Medical samples — Stock Photo
    Medical samples
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Variety of potential drugs in pharmaceutical vials and test tubes. — Stock Photo
    Variety of potential drugs in pharmaceutical vials and test tubes.
    Drug research and clinical testing — Stock Photo
    Drug research and clinical testing
    Pipette adding a solution to a sample — Stock Photo
    Pipette adding a solution to a sample
    Pipette adding a solution to a sample — Stock Photo
    Pipette adding a solution to a sample
    Drug research and clinical testing — Stock Photo
    Drug research and clinical testing
    Scientist viewing medical sample on glass slide under microscope in laboratory. — Stock Photo
    Scientist viewing medical sample on glass slide under microscope in laboratory.
    Scientist viewing sample on glass slide under light microscope. — Stock Photo
    Scientist viewing sample on glass slide under light microscope.
    Close-up of tube and syringe in hematology laboratory with scientist in background. — Stock Photo
    Close-up of tube and syringe in hematology laboratory with scientist in background.
    Close-up of tube and syringe in hematology laboratory with scientist in background. — Stock Photo
    Close-up of tube and syringe in hematology laboratory with scientist in background.
    Microbiologist working with petri dish and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dish and test tubes in laboratory.
    Metal door to clean room — Stock Photo
    Metal door to clean room
    Drug research and clinical testing — Stock Photo
    Drug research and clinical testing
    Pipette adding a solution to a sample — Stock Photo
    Pipette adding a solution to a sample
    Variety of potential drugs in pharmaceutical vials and test tubes. — Stock Photo
    Variety of potential drugs in pharmaceutical vials and test tubes.
    Scientist viewing sample on glass slide before light microscope. — Stock Photo
    Scientist viewing sample on glass slide before light microscope.
    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.
    Pipette adding a solution to a sample — Stock Photo
    Pipette adding a solution to a sample
    Variety of potential drugs in petri dish on DNA autoradiogram. — Stock Photo
    Variety of potential drugs in petri dish on DNA autoradiogram.
    Researcher using a light microscope for studying tube containing blood sample. — Stock Photo
    Researcher using a light microscope for studying tube containing blood sample.
    Female scientist examining bacterial culture growing in petri dish. — Stock Photo
    Female scientist examining bacterial culture growing in petri dish.
    Female scientist examining bacterial culture growing in petri dish. — Stock Photo
    Female scientist examining bacterial culture growing in petri dish.
    Scientist examining specimen under microscope during clinical trial in laboratory. — Stock Photo
    Scientist examining specimen under microscope during clinical trial in laboratory.