Scientists and engineers in the US have come up with a health monitoring chip they say is powered by human blood and which could help diagnose illnesses in remote regions that lack medical facilities. A University of Pittsburgh team said their 3D-printed “pocket-sized lab” could lead to “opening doors to medical care in any location.” So-called lab-on-a-chip devices already exist in the form of pregnancy and Covid-19 tests, but a handheld and disposable device of this form, requiring only a few drops of blood to check for certain conditions, would be a first in health care. “As the fields of n…