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Teacher assisting students in chemical experiment at laboratory

Female laboratory assistant holding chemical flask.

Close-up of male scientist experimenting in laboratory

Scientist checking a solution in conical flask in lab

Ethnic doctor filling in syringe from bottle with vaccine preparing to vaccinate male African American patient in white background in a clinic during coronavirus outbreak

Laboratory assistants looking at chemical flask and smiling.

Close-up of male scientist experimenting in laboratory

Close-up of scientist hand pouring reagent into flask for chemical research.

Female laboratory assistant using pipette.

Anonymous female doctor with vaccine bottle and syringe

Schoolboy putting leaves on microscope slide in school laboratory.

Schoolboy doing science experiment in school chemistry laboratory.

Attentive female scientist using pipette in laboratory

Schoolboy using glassware and equipment in school laboratory.

UK map formed in fumes from dangerous science experiment

Crop concentrated female scientist in white robe and gloves conducting chemical experiment with substance and syringe while working in modern laboratory

Female scientist in laboratory looking at glass flask with dissolved samples of soil.

Mid section of male scientist experimenting in laboratory

Test tube with blue chemical fluid placed in cold water in glass jar in modern equipped laboratory

Teenage girl experimenting chemical solution in laboratory

Attentive university student doing a chemical experiment in laboratory

$Doctor in latex gloves and face shield filling in syringe from bottle with vaccine preparing to vaccinate unrecognizable female African American patient in clinic during coronavirus outbreak — Stock Photo$

Doctor in latex gloves and face shield filling in syringe from bottle with vaccine preparing to vaccinate unrecognizable female African American patient in clinic during coronavirus outbreak

Attentive male scientist experimenting in laboratory

Blurred unrecognizable medic in protective face shield mask and latex gloves with vial of coronavirus vaccine and syringe showing to camera while standing in hospital room

Pollution control inspector in protective suit taking sample of toxic substance leaking from oil drum.

$Female doctor in latex gloves and face shield standing with chemical liquid in glass vial preparing to vaccinate patient in clinic during coronavirus outbreak — Stock Photo$

Female doctor in latex gloves and face shield standing with chemical liquid in glass vial preparing to vaccinate patient in clinic during coronavirus outbreak

Blurred unrecognizable medic in protective mask and latex gloves showing to camera glass vial of coronavirus vaccine while standing in black background in hospital room

Unrecognizable medic in protective face shield mask and latex gloves with vial of coronavirus vaccine and syringe showing to camera while standing in hospital room

Attentive male scientist experimenting in laboratory

Blurred unrecognizable medic in protective face shield mask and latex gloves with vial of coronavirus vaccine and syringe showing to camera while standing in hospital room

Doctor in latex gloves and face shield filling in syringe from bottle with vaccine preparing to vaccinate unrecognizable female African American patient in clinic during coronavirus outbreak

Lab technician holding tray of calibrated samples

Mid section of scientists experimenting in laboratory

Blurred unrecognizable medic in protective face shield mask and latex gloves with vial of coronavirus vaccine and syringe showing to camera while standing in hospital room

Attentive female scientist experimenting in laboratory

Male photographer cleaning a lens cover with liquid in photo studio

$Female doctor in latex gloves and face shield filling in syringe from bottle with vaccine preparing to vaccinate patient in clinic during coronavirus outbreak — Stock Photo$

Female doctor in latex gloves and face shield filling in syringe from bottle with vaccine preparing to vaccinate patient in clinic during coronavirus outbreak

Team of scientists experimenting together in laboratory

College students experimenting chemical in laboratory at university

Blurred unrecognizable medic in protective mask and latex gloves with vial of coronavirus vaccine and syringe standing in black background in hospital room

$Cropped unrecognizable doctor in latex gloves filling in syringe from bottle with vaccine preparing to vaccinate young African American woman patient in clinic during coronavirus outbreak — Stock Photo$

Cropped unrecognizable doctor in latex gloves filling in syringe from bottle with vaccine preparing to vaccinate young African American woman patient in clinic during coronavirus outbreak

$Crop hands of anonymous doctor in latex gloves filling in syringe from bottle with vaccine preparing to vaccinate unrecognizable male African American patient in clinic during coronavirus outbreak — Stock Photo$

Crop hands of anonymous doctor in latex gloves filling in syringe from bottle with vaccine preparing to vaccinate unrecognizable male African American patient in clinic during coronavirus outbreak

Crop concentrated female scientist in white robe and gloves conducting chemical experiment with substance and syringe while working in modern laboratory

Female photographer using electronic device in photo studio

Close-up of scientist hand agitating liquid in flask for chemical research.

Laboratory scientist adding a small amount of solid reagent to a container on a scale

Anonymous female doctor with vaccine bottle and syringe

Schoolboy doing science experiment in school chemistry laboratory.

Scientific or medical samples on glass table

Scientists experimenting together in laboratory

Side view of two scientists doing experiment in lab

Scientist hand sampling water in flask for quality testing.

Scientific or medical samples on glass table

Side view of male scientist experimenting in laboratory

$Female doctor in latex gloves and face shield standing with chemical liquid in glass vial preparing to vaccinate patient in clinic during coronavirus outbreak — Stock Photo$

Female doctor in latex gloves and face shield standing with chemical liquid in glass vial preparing to vaccinate patient in clinic during coronavirus outbreak

Attentive university students doing a chemical experiment in laboratory

Scientist checking a solution in conical flask at lab

Team of scientists experimenting together in laboratory

Scientists experimenting together in laboratory

Female photographer cleaning a lens cover with liquid in photo studio