Who is H. pylori looking for Nowadays, H. pylori (Hp) is becoming more and more famous and some medical check-up centers are including “blowing” (a method to detect Hp) as a trendy item, and many parents are asking for testing with their young children. how does Hp move around in the family? Who is helping when Hp is “doing bad things”? The Hp is a “snob” and it has “three bullies and three fears”. First, it is “bullying small fear” children of all ages can be infected by H. pylori, but the susceptibility rate is not the same. In our country, among infected children, 40% to 60% are infected before the age of 10, that is, a sharp increase in the rate of infection by 3% to 10% per year, to 10 years old, the annual rate of 0.5% to 1% slowly increase. Second, it is “bullying the poor and afraid of the rich” economically developed or rich countries, regions, families, children Hp infection rate is low, while the developing countries or poor areas of children Hp infection rate is high. And the initial age of infection is small, for example, the infection rate of children in Ivory Coast is 15.7 times higher than in France. In China, the infection rate of children in the same age group is lower in Guangdong group than in Shaanxi group. Third, it is “bullying the weak and afraid of the strong” for chronic diarrhea, malnutrition, immunocompromised, orphans, mentally retarded children and other very vulnerable groups, their H. pylori infection rate is much higher than that of healthy children of the same age. The Hp infestation in the home can be compared to a “burglar entering a home”. Families that have been burglarized should of course carefully check for weaknesses in home facilities and safety habits that could be exploited by the “thief”. In the case of H. pylori infection, these loopholes are various risk factors. Children living in crowded homes, especially those who share beds with adults, have a high rate of infection. The author’s survey in Shaanxi found that the high rate of Hp infection was inversely related to the size of the family housing. A Brazilian survey noted that urban households with water and sewer systems had much lower rates of Hp infection than rural households without such systems, regardless of adult or child groups. National reports more specifically point to the absence of a flush toilet in the home as a risk factor for H. pylori infection. This is because Hp may survive in river water for more than a week; when survival conditions are unfavorable, it may even survive in river water for more than a year. Infection at the table is the most common Drinking raw water, often eat raw vegetables or unwashed fruits and vegetables are susceptible to infection, the reason is related to water contamination. The author’s survey found that, in terms of H. pylori infection rate, drinking pond water is higher than well water, and the lowest among those who drink tap water. Infants and children who have been fed with chewed food by adults or who have used adult pacifiers are among the most infected, whether in childhood or after adulthood. Sharing dishes, cups, and dental utensils, and using unsterilized dishes can lead to H. pylori infection. People in Asia do not share meals, and the chopsticks and spoons of those who enter the table have free access to soup pots and vegetable bowls, which can also cause infection. Kissing and contact with vomit and reflux from people who are bacterially positive in the family are risk factors for infection between spouses. To cut the chain of H. pylori infection in the family and completely eradicate H. pylori, we have to start by improving sanitation facilities and changing various bad hygiene habits. That is, as mentioned above, to eliminate all kinds of loopholes, and at the same time to improve the body’s resistance.