Scientists found that one of the main reasons for the rapid increase of diabetes in children under the age of 5 is that they are not exposed to bacteria and germs in childhood  Those who live in rural areas have more opportunities to get along with pets because of the earlier exposure to the substances carrying bacteria, and the risk of allergies, asthma, eczema and other diseases is very low
Most bacteria are good for health, and people's health and longevity are inseparable from normal flora.
 An environment in which bacteria are eliminated too thoroughly may harm children's health