Plus, how to pee in zero-G.





Episode Guests: Microbiologist and faculty director of The Microbiome Center, Jack Gilbert; host of The Habitat podcast, Lynn Levy.





Special thanks to caller Jenny and the experts we surveyed: Jason Tetro, William Schaffner, Chuck Gerba, Rob Dunn, Jenny Hayden, Steffanie Strathdee, Liz Scott, Kimberly Page, and Maria Gloria Dominguez-Bello.





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