I don’t fully get the 10–90 % reference, but I do know that we will die or badly function without the micro-organisms. It’s a little bit what I’ve asked myself. Is the human body to be considered as one organism or a synchronized collective? We have 1.5 kg of some 500 different bacteria in the intestines. More in the lungs, vagina, eyes, and the skin. Fungus as a part of the skin. There are many things we don’t understand about the body. Actually, there is not much we do. It’s quite recent we realized that the appendix actually has a function, and it’s bacterial. I see the likelihood and benefits of treatment of and with microbiota in medicine. The russians already do it succesfully since quite some time. The possibilities of using bacteria and virus as a cure is to promising to ignore. It’s quite possible and likely that we will be treating cancer with engineered viruses in the future.