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NEED TO KNOW | Blood test: What you don't know about blood | PBS

http://www.pbs.org/wnet/need-to-know/health/video-blood-test-what-you-dont-know-about-blood/3036/ For decades, blood has been called "the gift of life." Each year, close to five million Americans receive a blood transfusion. For many, that transfusion will be a lifesaver. But for others, a transfusion may do more harm than good, according to some doctors and researchers. For those patients, there may be a better alternative. Need to Know medical correspondent Dr. Emily Senay reports on the potential problems, and ingenious solutions, to the time-honored practice of blood transfusions. Need to Know airs Fridays on PBS. Watch full-length episodes of Need to Know at http://video.pbs.org/program/1458405365/
Length: 15:17

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