Blood diagnostics modelled on leeches

Researchers at ETH Zurich have developed a safe and inexpensive device for reliable blood measurements. It works using a suction cup and could also be employed to diagnose the tropical disease malaria – even by non-medical personnel.

Finger with a leech hanging from it
By swallowing, leeches create a negative pressure through which they suck blood from the wound. (Photograph: Colourbox)

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