It's not only your body that's home to various microbiomes -- your home also harbors countless species, big and small.

Rob Dunn, "daily life" biologist and the author of five books, including his most recent, award-winning title "Never Home Alone," joins Andrea to talk about how everything from water filters to sourdough bread inform what's taking up residence within your four walls.

From spiders and mold to dogs and MRSA, we're never really home alone...even when we're quarantining solo.