The population is generally susceptible to H. pylori, H. pylori survival in the stomach has its own characteristics, because the stomach is an acidic environment, with food into the stomach bacteria can be killed most of the people infected with H. pylori reasons are as follows: 1, H. pylori is stronger, into the stomach after adhering to the mucosal layer, the mucus layer has isolation protection, H. pylori can colonize the mucosal layer to reproduce, thereby destroying the human immune; 2 2, H. pylori has a strong active urease, can break down urea, forming a local microenvironment of ammonia cloud, can make H. pylori colonize the stomach cavity to reproduce; 3, the population is generally susceptible to H. pylori, if the dietary environment is not reasonable, such as not washing hands before and after meals, group meals, especially in China or India and other countries that are not particularly developed economy, the dining environment is not particularly good The tendency of cross-infection will be formed. The prevalence of H. pylori infection varies from region to region, and is relatively low in regions with better economic conditions. Overall, the prevalence of H. pylori is more than 50% in most cases. Therefore, for the Chinese population, it is recommended to try to eat in restaurants with good sanitary conditions or to practice meal sharing.