A post on Omics! Omics! talks about whether or not all viruses are bad. Author Keith Robison points out that in the case of diphtheria, for example, the bacterial host is actually helped by the toxic virus it incorporates into its own genome. Not only does he bring up an interesting question, but he also proves that Marilyn vos Savant (of Parade magazine fame) either isn't the smartest lady in the world or needs to brush up on her virology.