Scientists have officially proven that children raised in rural areas, are faced with allergies and asthma much less children from big cities. The reason the immunization endotoxins, potentially dangerous substances. In small doses they cause in the body immunity, prevent the development of allergies, says The Hindu.
The theory was able to check on laboratory mice. Endotoxins mites in small doses increased the resistance of animals to allergens. The same mechanism is triggered in children who grow up in villages.
In addition, in the air of large cities circulating a lot of toxic substances that trigger asthma and allergies. Ecology in the villages, by contrast, is much better.