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    Tube with blood sample on metal tray in laboratory, close-up. — Stock Photo
    Tube with blood sample on metal tray in laboratory, close-up.
    Scientist hand holding blood drop sample on microscope slide, studio shot. — Stock Photo
    Scientist hand holding blood drop sample on microscope slide, studio shot.
    Close-up of scientist pipetting sample into eppendorf tube during experiment in laboratory. — Stock Photo
    Close-up of scientist pipetting sample into eppendorf tube during experiment in laboratory.
    Single test tube with blood sample. — Stock Photo
    Single test tube with blood sample.
    Pipette adding a solution to a sample — Stock Photo
    Pipette adding a solution to a sample
    Close-up of agar plate with stool culture. — Stock Photo
    Close-up of agar plate with stool culture.
    Light microscope on laboratory bench. — Stock Photo
    Light microscope on laboratory bench.
    Tubes for biological test in rack on blue background. — Stock Photo
    Tubes for biological test in rack on blue background.
    Container with biohazard warning tape containing forensic evidence. — Stock Photo
    Container with biohazard warning tape containing forensic evidence.
    Fat cells and supportive connective tissue — Stock Photo
    Fat cells and supportive connective tissue
    Blood samples in test tubes — Stock Photo
    Blood samples in test tubes
    Pipette adding sample to petri dish with DNA autoradiogram in background. — Stock Photo
    Pipette adding sample to petri dish with DNA autoradiogram in background.
    Close-up of pipetting sample into plastic micro-centrifuge tube. — Stock Photo
    Close-up of pipetting sample into plastic micro-centrifuge tube.
    Biologist hand with protective glove holding trowel with soil above samples separated in containers. — Stock Photo
    Biologist hand with protective glove holding trowel with soil above samples separated in containers.
    Close-up of multiple test stick being placed into urine sample tube by female doctor. — Stock Photo
    Close-up of multiple test stick being placed into urine sample tube by female doctor.
    Close-up of doctor holding prepared influenza nasal vaccine. — Stock Photo
    Close-up of doctor holding prepared influenza nasal vaccine.
    Petri dish with blood agar on blue background. — Stock Photo
    Petri dish with blood agar on blue background.
    Micropipette pipetting blood sample into Petri dish. — Stock Photo
    Micropipette pipetting blood sample into Petri dish.
    Female laboratory assistant holding chemical flask. — Stock Photo
    Female laboratory assistant holding chemical flask.
    Close-up of multiple test stick being placed into urine sample tube by female doctor. — Stock Photo
    Close-up of multiple test stick being placed into urine sample tube by female doctor.
    Tubes for biological test in rack on blue background. — Stock Photo
    Tubes for biological test in rack on blue background.
    Laboratory sample tubes in rack. — Stock Photo
    Laboratory sample tubes in rack.
    Scientist gloved hand holding gene chip. — Stock Photo
    Scientist gloved hand holding gene chip.
    Pipetting liquid into test tubes, close-up. — Stock Photo
    Pipetting liquid into test tubes, close-up.
    Close-up of hands of female scientist working in laboratory with pipette and flask. — Stock Photo
    Close-up of hands of female scientist working in laboratory with pipette and flask.
    Micropipette pipetting blood sample into Petri dishes. — Stock Photo
    Micropipette pipetting blood sample into Petri dishes.
    Female researcher preparing multi-well sample tray of blood for analysis. — Stock Photo
    Female researcher preparing multi-well sample tray of blood for analysis.
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    Tissue culture labelled wells with pink fluid and gel nourishes. — Stock Photo
    Tissue culture labelled wells with pink fluid and gel nourishes.
    Still life of microscope on laboratory bench. — Stock Photo
    Still life of microscope on laboratory bench.
    Plastic test tubes with green lids in rack. — Stock Photo
    Plastic test tubes with green lids in rack.
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample. — Stock Photo
    Colored scanning electron micrograph of resting T-lymphocytes from human blood sample.
    Blood collection kit — Stock Photo
    Blood collection kit
    Syringe dripping blood sample into multiwell tray. — Stock Photo
    Syringe dripping blood sample into multiwell tray.
    Petri dishes on laboratory table, close-up. — Stock Photo
    Petri dishes on laboratory table, close-up.
    Tube with blood sample on metal tray in laboratory, close-up. — Stock Photo
    Tube with blood sample on metal tray in laboratory, close-up.
    Close-up of sample tubes in rack. — Stock Photo
    Close-up of sample tubes in rack.
    Medical samples — Stock Photo
    Medical samples
    Medical samples — Stock Photo
    Medical samples
    Microbiological culture growing in Petri dish. — Stock Photo
    Microbiological culture growing in Petri dish.
    Tubes for biological test in rack on blue background. — Stock Photo
    Tubes for biological test in rack on blue background.
    Close-up of pipetting into Eppendorf tubes. — Stock Photo
    Close-up of pipetting into Eppendorf tubes.
    Close-up view of researcher hand taking blood sample from rack of medical samples. — Stock Photo
    Close-up view of researcher hand taking blood sample from rack of medical samples.
    Test tube with red lid on blue background. — Stock Photo
    Test tube with red lid on blue background.
    Scientific or medical samples on glass table — Stock Photo
    Scientific or medical samples on glass table
    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.
    Close-up of pipetting sample into microcentrifuge tubes. — Stock Photo
    Close-up of pipetting sample into microcentrifuge tubes.
    Pipette placing sample into test tube during experiment in laboratory. — Stock Photo
    Pipette placing sample into test tube during experiment in laboratory.
    Glass phial with blood sample. — Stock Photo
    Glass phial with blood sample.
    Doctor preparing HIV test sample for testing in laboratory. — Stock Photo
    Doctor preparing HIV test sample for testing in laboratory.
    Blood samples — Stock Photo
    Blood samples
    Close-up of female scientist taking notes in soil testing laboratory. — Stock Photo
    Close-up of female scientist taking notes in soil testing laboratory.
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample. — Stock Photo
    Colored scanning electron micrograph of activated T lymphocyte from human blood sample.
    Close-up of pipetting sample into plastic micro-centrifuge tube rack. — Stock Photo
    Close-up of pipetting sample into plastic micro-centrifuge tube rack.
    Scientist pipetting sample into micro centrifuge tubes ready for automated analysis. — Stock Photo
    Scientist pipetting sample into micro centrifuge tubes ready for automated analysis.
    Cropped view of doctor holding vial of blood for testing. — Stock Photo
    Cropped view of doctor holding vial of blood for testing.
    Close-up of multipipette sampling liquid into tube rack in laboratory. — Stock Photo
    Close-up of multipipette sampling liquid into tube rack in laboratory.
    Close-up of pipetting sample into plastic micro-centrifuge tube rack. — Stock Photo
    Close-up of pipetting sample into plastic micro-centrifuge tube rack.
    Still life of microscope on laboratory bench. — Stock Photo
    Still life of microscope on laboratory bench.