The DNA you leave behind when you touch things can actually be more useful than just the cellular DNA isolated from a genome test and put into a database. DNA

The DNA you leave behind when you touch things can actually be more useful than just the cellular DNA isolated from a genome test and put into a database. DNA analysis of your microbiota can indicate more than just what you are or who you are, but also your current health status, where you have been, and who you associate with. It would also be one way to distinguish between identical twins.