Without germs, we're nothing
Bacteria outnumber us a trillion to one. So it's a good thing most of them are friendly.
Gerald Callahan, the author of Infection: The Uninvited Universe, talks about why we need bacteria to survive.
Gallery
Create a More Connected Minnesota
MPR News is your trusted resource for the news you need. With your support, MPR News brings accessible, courageous journalism and authentic conversation to everyone - free of paywalls and barriers. Your gift makes a difference.