Immunologist Daniel Davis says scientists are harnessing the power of the immune system to create new medications to fight cancer, auto-immune conditions and other diseases. He also talks about how the immune system is affected by stress, sleep, and age. Davis' book is 'The Beautiful Cure.'
Also, rock critic Ken Tucker shares an appreciation of country artist Lefty Frizzell. The new box set, 'An Article From Life,' spans his career.
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