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Humans bring millions of bacteria to indoor spaces, study says
California Watch

You are a big bag of germs. And just by walking into a room, you add 37 million bacteria to the air for every hour you remain there.

At least, that’s what researchers at UC Berkeley and Yale University have discovered about the presence of a person in a room. “We live in this microbial soup, and a big ingredient is our own microorganisms,” said Jordan Peccia, associate professor of environmental engineering at Yale and principal investigator of the study, which was published in the most recent edition of the journal Indoor Air.