I recently had to share air via a buddy's octopus on a dive...told my wife (a non-diver) about it and now she is concerned I may have been exposed to TB, syphilis, AIDS, Pellagra, Halitosis, Athletes Foot...you get the picture. My question is this: Has there ever been a documented case of disease transmission from either using an Octopus reg or from Buddy Breathing from a single regulator? Thanks for the responses.