Scientists viewing a medical sample on a glass slide under a microscope in the laboratory.

Scientists viewing a medical sample on a glass slide under a microscope in the laboratory.

Scientists viewing a sample on a glass slide under a light microscope.

Scientists viewing a sample on a glass slide under a light microscope.

Scientists viewing a sample on a glass slide under a light microscope.

Scientists viewing a biological sample on a glass slide under a light microscope.

Medical screening

Medical screening

Scientists preparing a human blood sample for analysis under a light microscope.

Scientist examining specimens under a microscope during a clinical trial in the laboratory.

Scientists preparing a human blood sample for analysis under a light microscope.

Female cell biologist placing a flask containing stem cells, cultivated in red growth medium, under a microscope.

Stem cell research. Female scientist examining cell cultures in multiwell tray

Gastrointestinal biopsy slides - stained tissue samples taken from a woman's gastrointestinal tract. Slides will be examined under a microscope for abnormalities indicating Crohns or infection

Close up of cell biologist holding a flask containing stem cells

Close up of cell biologist holding a flask containing stem cells

Female cell biologist holding a flask containing stem cells, cultivated in red growth medium, to investigate disease

Medical screening. Scientist examining a glass slide containing a human sample under a microscope.