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US scientists have created a tiny device that simulates a working human lung and could reduce the need for testing pharmaceutical compounds in animals. The “lung-on-a-chip” contains hollow channels lined with living human cells that mimic the interface between the air sacks in the lung and the blood vessels beneath, allowing scientists to study the body’s response to lung infections and diseases. The chip’s inventors at the Wyss Institute for Biologically Inspired Engineering at Harvard University have received an annual international prize for the device’s potential to gradually reduce the use of animals in drug testing. Please click on the link above to read more at The Engineer.