Is there a constant battle between our immune system and pathogens? Does the fighting ever end? Does the immune system do more than just provide defense against pathogens? 

On this episode, Art and Marty talk to Fred Tauber, a professor emeritus of medicine and philosophy at Boston University, about how the immune system does more than just protect our bodies from pathogens. Fred has published a number of books on immunity and philosophy. In his most recent book, "Immunity: The Evolution of an Idea", he explores the ideas discussed in this episode in greater detail.

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