I’m going to take a break from our regularly scheduled debunking of John Everett’s Senate testimony, to pose a question for creationists and cDesign Proponentsists: Why do people catch swine flu but not tobacco mosaic virus?

I’m not asking why people get sick. I’m not interested in a rehashing of the tired old arguments about the coexistence of god and human suffering. I want an explanation of the fact that, despite the myriad pathogens which infect other branches of the tree of life, it’s only pathogens from other animals (usually other vertebrates) which make humans sick. Poxes, tuberculosis, and anthrax infect cattle. HIV is a mutant variant of Simian Immunodeficiency Virus, which infects other primates. Why don’t we fall ill from Partitivirus, pathogen of fungi? Or T4 phage, parasite of bacteria?

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