Discoverer of Cancer Causing Hepatitis B Virus and Nobel Prize Winner Dies:  an apparent unrecognized “One Health” example     Baruch S. Blumberg, MD, PhD, physician Nobel Prize winning biochemist and medical researcher who discovered the hepatitis B virus and subsequently showed that it could cause liver cancer (i.e., hepatocellular carcinoma) and helped develop a vaccine against it, died Tuesday.  Among many other achievements, Dr. Blumberg was also associated with a National Aeronautics and Space Administration (NASA) project to find microorganisms in space.   According to an April 6, 2011 New York Times obituary, “… As in his disease studies, Dr. Blumberg sought collaborations with specialists in a variety of fields, including physics, chemistry, geology, paleontology and oceanography as well as biology and medicine that would “help us to recognize biospheres that might be different from our own” …   This represents the essence of One Health!