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    Female scientist holding blood samples in test tubes. — Stock Photo
    Female scientist holding blood samples in test tubes.
    Close-up of micropipette pipetting blood sample into microcentrifuge tubes. — Stock Photo
    Close-up of micropipette pipetting blood sample into microcentrifuge tubes.
    Test tubes with red liquid in rack. — Stock Photo
    Test tubes with red liquid in rack.
    Testing blood sample from a multi well plate during a clinical investigation. — Stock Photo
    Testing blood sample from a multi well plate during a clinical investigation.
    Close-up of microcentrifuge tubes with blood samples. — Stock Photo
    Close-up of microcentrifuge tubes with blood samples.
    Close-up of micropipette pipetting blood sample into microcentrifuge tubes. — Stock Photo
    Close-up of micropipette pipetting blood sample into microcentrifuge tubes.
    Stacked Petri dishes with blood agar on plain background. — Stock Photo
    Stacked Petri dishes with blood agar on plain background.
    Rack of test tubes with blood samples on blue background. — Stock Photo
    Rack of test tubes with blood samples on blue background.
    Blood samples — Stock Photo
    Blood samples
    PCR micro tube strip with red liquid. — Stock Photo
    PCR micro tube strip with red liquid.
    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.
    Stacked Petri dishes with blood agar on plain background. — Stock Photo
    Stacked Petri dishes with blood agar on plain background.
    Petri dishes with blood agar on blue background. — Stock Photo
    Petri dishes with blood agar on blue background.
    Rack of test tubes with blood samples on blue background. — Stock Photo
    Rack of test tubes with blood samples on blue background.
    Blood samples in PCR tubes. — Stock Photo
    Blood samples in PCR tubes.
    Bags of donated blood in laboratory. — Stock Photo
    Bags of donated blood in laboratory.
    Close-up of human blood and various hiv samples in test tubes while screening in medical lab. — Stock Photo
    Close-up of human blood and various hiv samples in test tubes while screening in medical lab.
    Racks of samples in test tubes and Petri dishes on laboratory table. — Stock Photo
    Racks of samples in test tubes and Petri dishes on laboratory table.
    Barcodes on test tubes with blood samples. — Stock Photo
    Barcodes on test tubes with blood samples.