"The skin is home to a virtual zoo of bacteria"

The most numerous cells in our body are microbial—they outnumber our cells 10 to 1. The body has microbes native to the body, including the skin, and these populations change according to how we live, he says. "Ultimately what we want to do is compare disease and health," says Dr. Blaser. Keeping bacterial populations in our body stable may be part of staying healthy, he says.

10 to 1........hmmm. Then add the gut, CFS, brain, etc...and gene transfer. Wow. It's like a microcosm that's complicated as hell.