Have you ever thought that hygiene can harm your child's immunity? From childhood we are taught that bacteria are our enemies, and we raise our own children the same way. But what is more harmful – a microbial environment or sterile cleanliness? Here is a revolutionary book about how to properly raise and educate a child in order to form a strong immune system - from leading Western microbiologists. Marie-Claire Arrieta and B. Brett Finlay argue that timely contact with various bacteria reduces the risk of a child developing diseases such as asthma, diabetes, and obesity in the future. What to do? • Stay away from pets; • Wash and boil children's toys ;• Wash your hands with soap......or should you still let your child immerse himself in a microbial environment?