Scientific studies suggest that streptcocci might protect us from cancer and staphylococci from multiple sclerosis. Lactic acid bacteria apparently stimulate the development of human stem cells. Don't we urgently need a profound re-thinking in dealing with microbes? No microorganism is evil per se. Microbes, especially bacteria, viruses and retroviruses, are part of a million-year-old symbiosis in evolution. Only WITH microbes have we become what we are today. Germs and humans work symbiotically together everywhere in the organism, even in the brain. This is not only about joint survival, but above all about further development. That's what I call ImmunSymbiosis. So how can we care for our microbes and protect them? The prevention and treatment of chronic, neurological or neurodegenerative diseases can only succeed if people AND microbes become healthy. Based on scientific studies, my experiences from therapeutic practice and research, connections between diseases and microorganisms appear to me in a completely new light. I would like to invite you as interested reader, affected patient or therapist on a journey through the world of microbes, which could fundamentally change your point of view.