AI is finding its place in all sorts of scientific fields, and health care is no exception. Programs are learning to answer patients' medical questions and diagnose illnesses, but there are problems to be worked out. Dr. Isaac Kohane, editor-in-chief of the New England Journal of Medicine AI and chair of Harvard's department of biomedical informatics, joins John Yang to discuss. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders