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    Senior man using peak flow meter, close-up. — Stock Photo
    Senior man using peak flow meter, close-up.
    Colorist mixing hair dye — Stock Photo
    Colorist mixing hair dye
    Microbiologist working with petri dish and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dish and test tubes in laboratory.
    Eggs in lighting control quality in egg factory — Stock Photo
    Eggs in lighting control quality in egg factory
    Scientist analyzing a sample in a test tube at lab — Stock Photo
    Scientist analyzing a sample in a test tube at lab
    Microbiologist taking bacterial sample on microscope slide. — Stock Photo
    Microbiologist taking bacterial sample on microscope slide.
    Platelets in blood vessel — Stock Photo
    Platelets in blood vessel
    Carpenter looking at repaired door at home — Stock Photo
    Carpenter looking at repaired door at home
    Close up mid section view of man working in a microbrewery, holding malt in hand over a bag. — Stock Photo
    Close up mid section view of man working in a microbrewery, holding malt in hand over a bag.
    Mid section of male worker working in glass factory — Stock Photo
    Mid section of male worker working in glass factory
    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.
    Female staff examining egg on digital egg monitor in egg factory — Stock Photo
    Female staff examining egg on digital egg monitor in egg factory
    Chinese doctor testing senior man blood pressure — Stock Photo
    Chinese doctor testing senior man blood pressure
    DNA testing using saliva sample. — Stock Photo
    DNA testing using saliva sample.
    Boy standing by a river dipping his toe in the water, United States — Stock Photo
    Boy standing by a river dipping his toe in the water, United States
    Lab chemist capturing a digital image of a sample slide on a microscope — Stock Photo
    Lab chemist capturing a digital image of a sample slide on a microscope
    A garage or auto repair shop air pressure valve with compressor machine — Stock Photo
    A garage or auto repair shop air pressure valve with compressor machine
    Wheat in petri dish, studio shot. — Stock Photo
    Wheat in petri dish, studio shot.
    Pipette adding a solution to a sample — Stock Photo
    Pipette adding a solution to a sample
    Man and older lady walking dog on sidewalk of suburban neighborhood. — Stock Photo
    Man and older lady walking dog on sidewalk of suburban neighborhood.
    Vintner testing wine from stainless steel vat in winery cellar — Stock Photo
    Vintner testing wine from stainless steel vat in winery cellar
    Close-up of petri dishes and pipette for genetic research. — Stock Photo
    Close-up of petri dishes and pipette for genetic research.
    Caucasian and African American man, working in a microbrewery, holding files and discussing while counting wooden barrels, with vats in the background.. — Stock Photo
    Caucasian and African American man, working in a microbrewery, holding files and discussing while counting wooden barrels, with vats in the background..
    Preschooler boy undergoing logic cards test for developmental psychology test in female psychologist office. — Stock Photo
    Preschooler boy undergoing logic cards test for developmental psychology test in female psychologist office.
    Skillful caucasian electrician working in home — Stock Photo
    Skillful caucasian electrician working in home
    Happy Carpenter standing near repaired door at home — Stock Photo
    Happy Carpenter standing near repaired door at home
    Female scientist examining bacterial culture growing in petri dish. — Stock Photo
    Female scientist examining bacterial culture growing in petri dish.
    Cropped image of Female worker examining egg on digital egg monitor in egg factory — Stock Photo
    Cropped image of Female worker examining egg on digital egg monitor in egg factory
    Close-up of examination of soil samples in agricultural laboratory. — Stock Photo
    Close-up of examination of soil samples in agricultural laboratory.
    Hand in latex glove holding ear of wheat — Stock Photo
    Hand in latex glove holding ear of wheat
    Ophthalmologist examining boy eyes with slit lamp in clinic. — Stock Photo
    Ophthalmologist examining boy eyes with slit lamp in clinic.
    Technicians examining meat processing machine at meat factory — Stock Photo
    Technicians examining meat processing machine at meat factory
    Woman in a black swimsuit — Stock Photo
    Woman in a black swimsuit
    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.
    Toddler girl testing the water at edge of swimming pool — Stock Photo
    Toddler girl testing the water at edge of swimming pool
    Salesman standing next to car and reading brochure outside the showroom — Stock Photo
    Salesman standing next to car and reading brochure outside the showroom
    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
    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.
    Hand holding multi well plate with samples with DNA results in background. — Stock Photo
    Hand holding multi well plate with samples with DNA results in background.
    Blood test kit and and analysis results — Stock Photo
    Blood test kit and and analysis results
    Elementary age boy undergoing sight examination with slit lamp in ophthalmology clinic. — Stock Photo
    Elementary age boy undergoing sight examination with slit lamp in ophthalmology clinic.
    Workers in protective suits using machinery in fiber optics research and testing laboratory — Stock Photo
    Workers in protective suits using machinery in fiber optics research and testing laboratory
    Female hands feeling forehead of baby for measuring temperature. — Stock Photo
    Female hands feeling forehead of baby for measuring temperature.
    Woman in a black swimsuit — Stock Photo
    Woman in a black swimsuit
    Police evidence bag — Stock Photo
    Police evidence bag
    Beautiful Malay lady using her mobile — Stock Photo
    Beautiful Malay lady using her mobile
    Computer programmers testing virtual reality simulator glasses at computer in office — Stock Photo
    Computer programmers testing virtual reality simulator glasses at computer in office
    Hands of scientist in laboratory mixing samples of soil with reagent. — Stock Photo
    Hands of scientist in laboratory mixing samples of soil with reagent.
    Pills in a Petri dish — Stock Photo
    Pills in a Petri dish
    DNA testing using saliva sample. — Stock Photo
    DNA testing using saliva sample.
    Mature doctor testing heart of male athlete on treadmill. — Stock Photo
    Mature doctor testing heart of male athlete on treadmill.
    Pipette bottles in tray with allergens. — Stock Photo
    Pipette bottles in tray with allergens.
    Preteen boy undergoing lung function test with female nurse. — Stock Photo
    Preteen boy undergoing lung function test with female nurse.
    Urine sample for analysis and test strip with chart, studio shot. — Stock Photo
    Urine sample for analysis and test strip with chart, studio shot.
    Close-up of antibiotic testing in petri dish. — Stock Photo
    Close-up of antibiotic testing in petri dish.
    DNA samples, autoradiogram and forensic evidence bag on blue background. — Stock Photo
    DNA samples, autoradiogram and forensic evidence bag on blue background.
    Close-up of doctor holding prepared influenza nasal vaccine. — Stock Photo
    Close-up of doctor holding prepared influenza nasal vaccine.
    Close-up of petri dish and dropping pipette for genetic research. — Stock Photo
    Close-up of petri dish and dropping pipette for genetic research.
    Woman smelling perfume in drugstore — Stock Photo
    Woman smelling perfume in drugstore
    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.