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Hosts: Vincent Racaniello, Michael Schmidt and Jo Handelsman.
On episode #15 of the podcast This Week in Microbiology, Vincent, Michael and Jo review the number of species on Earth, evidence that the 2010 Haitian cholera outbreak originated in Nepal, and how the gut microbiota influences the immune response to influenza virus infection of the lung. 
Right click to download TWiM #15 (43 MB, .mp3, 59 minutes).
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