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    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Scientist hand holding blood drop sample on microscope slide, studio shot. — Stock Photo
    Scientist hand holding blood drop sample on microscope slide, studio shot.
    Doctor preparing HIV test sample for testing in laboratory. — Stock Photo
    Doctor preparing HIV test sample for testing in laboratory.
    Scientist pipetting sample into tube for analytical testing in laboratory. — Stock Photo
    Scientist pipetting sample into tube for analytical testing in laboratory.
    Technician hand holding blood sample ready for testing in laboratory. — Stock Photo
    Technician hand holding blood sample ready for testing in laboratory.
    Female hands testing blood sample — Stock Photo
    Female hands testing blood sample
    Close-up view of tubes with blood samples. — Stock Photo
    Close-up view of tubes with blood samples.
    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.
    Ophthalmologist examining patient with slit lamp and magnifying lens. — Stock Photo
    Ophthalmologist examining patient with slit lamp and magnifying lens.
    Nurse takes sample for covid-19 — Stock Photo
    Nurse takes sample for covid-19
    Scientist viewing medical sample on glass slide under microscope in laboratory. — Stock Photo
    Scientist viewing medical sample on glass slide under microscope in laboratory.
    Drug research and clinical testing — Stock Photo
    Drug research and clinical testing
    Ophthalmologist helping boy wearing glasses while eye examination in clinic. — Stock Photo
    Ophthalmologist helping boy wearing glasses while eye examination in clinic.
    Technician holding urine sample for testing in laboratory. — Stock Photo
    Technician holding urine sample for testing in laboratory.
    Female doctor putting headphones on boy having hearing test. — Stock Photo
    Female doctor putting headphones on boy having hearing test.
    Police evidence bag — Stock Photo
    Police evidence bag
    Close-up of doctor holding prepared influenza nasal vaccine. — Stock Photo
    Close-up of doctor holding prepared influenza nasal vaccine.
    Lab chemist handling water sample — Stock Photo
    Lab chemist handling water sample
    Blood in human urine in sample pots, studio shot. — Stock Photo
    Blood in human urine in sample pots, studio shot.
    Doctor giving young girl finger prick test. — Stock Photo
    Doctor giving young girl finger prick test.
    African american senior male doctor performing throat swab test on african american man at home. medical testing for prevention of coronavirus outbreak concept — Stock Photo
    African american senior male doctor performing throat swab test on african american man at home. medical testing for prevention of coronavirus outbreak concept
    Close-up of sample on red liquid in centrifuge tube. — Stock Photo
    Close-up of sample on red liquid in centrifuge tube.
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Happy black woman in optometry cabinet during study of the eyesight — Stock Photo
    Happy black woman in optometry cabinet during study of the eyesight
    Doctor reading the results of blood test while holding blood sample. — Stock Photo
    Doctor reading the results of blood test while holding blood sample.
    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.
    Medium tray with cells and DNA autoradiogram for scientific research. — Stock Photo
    Medium tray with cells and DNA autoradiogram for scientific research.
    Female pediatrician performing allergy skin prick test on little boy with mother in immunologist office. — Stock Photo
    Female pediatrician performing allergy skin prick test on little boy with mother in immunologist office.
    Female patient at eye examination in ophthalmology clinic. — Stock Photo
    Female patient at eye examination in ophthalmology clinic.
    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 view of vacutainer with needle on tray. — Stock Photo
    Close-up view of vacutainer with needle on tray.
    Blood sample in kidney dish with urine sample on table. — Stock Photo
    Blood sample in kidney dish with urine sample on table.
    Ophthalmologist examining patient with slit lamp in clinic. — Stock Photo
    Ophthalmologist examining patient with slit lamp in clinic.
    Ophthalmologist helping boy wearing glasses while eye examination in clinic. — Stock Photo
    Ophthalmologist helping boy wearing glasses while eye examination in clinic.
    Female immunologist performing skin prick allergy testing on preschooler boy. — Stock Photo
    Female immunologist performing skin prick allergy testing on preschooler boy.
    Blood samples in a multi well plate during a clinical trial. — Stock Photo
    Blood samples in a multi well plate during a clinical trial.
    Scientists viewing sample on glass slide under light microscope. — Stock Photo
    Scientists viewing sample on glass slide under light microscope.
    Male scientist doing medical testing of sample under microscope. — Stock Photo
    Male scientist doing medical testing of sample under microscope.
    Ophthalmologist examining patient with slit lamp and magnifying lens. — Stock Photo
    Ophthalmologist examining patient with slit lamp and magnifying lens.
    Scientist analyzing a sample in a test tube at lab — Stock Photo
    Scientist analyzing a sample in a test tube at lab
    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 pipetting sample into multiwell plate for analysis in laboratory. — Stock Photo
    Close-up of pipetting sample into multiwell plate for analysis in laboratory.
    Smart business executive checking sugar level in office — Stock Photo
    Smart business executive checking sugar level in office
    Doctor using a glucometer to take a blood glucose reading from a patient. — Stock Photo
    Doctor using a glucometer to take a blood glucose reading from a patient.
    Cropped view of scientist holding sample for analytical testing. — Stock Photo
    Cropped view of scientist holding sample for analytical testing.
    Female doctor performing allergy skin prick test on little boy arm. — Stock Photo
    Female doctor performing allergy skin prick test on little boy arm.
    Biologist with protective gloves performing a coronavirus test on a person in a car — Stock Photo
    Biologist with protective gloves performing a coronavirus test on a person in a car
    Forensic DNA autoradiogram — Stock Photo
    Forensic DNA autoradiogram
    Boy having eye test with special equipment. — Stock Photo
    Boy having eye test with special equipment.
    Preschooler boy coloring shapes with colorful pens for developmental psychology test in psychologist office. — Stock Photo
    Preschooler boy coloring shapes with colorful pens for developmental psychology test in psychologist office.
    Close-up view of medical sample with genetic test results. — Stock Photo
    Close-up view of medical sample with genetic test results.
    Patient undergoing applanation tonometry and eye pressure test in ophthalmology clinic. — Stock Photo
    Patient undergoing applanation tonometry and eye pressure test in ophthalmology clinic.
    Black woman in optometry cabinet during study of the eyesight — Stock Photo
    Black woman in optometry cabinet during study of the eyesight
    Black woman in optometry cabinet during study of the eyesight — Stock Photo
    Black woman in optometry cabinet during study of the eyesight
    Optician using phoropter for eye examination preteen girl. — Stock Photo
    Optician using phoropter for eye examination preteen girl.
    Scientist hand holding blood drop sample on microscope slide, studio shot. — Stock Photo
    Scientist hand holding blood drop sample on microscope slide, studio shot.
    Woman doing finger prick test — Stock Photo
    Woman doing finger prick test
    Preschooler boy coloring shapes with colorful pens for developmental psychology test in psychologist office. — Stock Photo
    Preschooler boy coloring shapes with colorful pens for developmental psychology test in psychologist office.
    Close-up of sample on red liquid in centrifuge tube. — Stock Photo
    Close-up of sample on red liquid in centrifuge tube.
    Blood sample awaiting testing in laboratory, close-up with selective focus. — Stock Photo
    Blood sample awaiting testing in laboratory, close-up with selective focus.