燃えているオレンジ色の粉末を見ている子供のハイパーラプス - ストックフッテージ＆ビデオ

Rack focus of kid looking at burning powder

A medical scientist in a lab studies malaria

CDC scientist in appropriate personal protective equipment isolates and tests for highly pathogenic avian influenza

Researchers conduct experiments at the Pacific Northwest National Laboratory in a generic lab environment.

Rack focus of kid looking at burning powder

Selective focus of african american scientist in glasses looking at blood sample in flask

Selective focus of african american scientist in glasses using microscope with sunlight on background

Close up view of african american scientist in glasses using microscope

Cropped view of scientist taking blood sample on glass

Cropped view of scientist setting up microscope