H. pylori (HP) infection is closely associated with chronic gastritis and is a high risk factor for the development of gastric cancer. H. pylori is mainly found in the stomach or duodenum of humans, and is also detected in the oral cavity of some infected individuals. Epidemiological surveys show that about 55% of adults in China are infected with H. pylori. The spread of H. pylori is mainly through “oral-oral” and “fecal-oral” transmission, so it is common to see one family member with H. pylori infection in the clinic and the whole family coming for examination. It is very unlikely that a person infected with H. pylori will be infected after just one meal. The main concern is how to avoid cross-infection among family members. It is true that family members eating together every day will increase the chance of H. pylori infection, but there is no need to worry too much. How can we minimize the risk of infection among family members? Indeed, for a “mouth-to-mouth” and “fecal-to-mouth” transmission of disease, sharing utensils and doing one set of dishes is the most effective way to eliminate cross-infection! But apart from sharing utensils, what other considerations are there? First of all, wash your hands regularly, before and after meals, this is the most basic hygiene habits, but also the basis of all fecal-oral transmission disease prevention. Second, do regular steaming and disinfection of tableware. 100°C boiling water for 30 minutes can kill all H. pylori. Change chopsticks often, if they have been used for a long time and have hairy, blackened tips, then replace them with new ones. Third, do not feed infants and children mouth-to-mouth or chewed food. Finally, regularly wipe your kitchen countertops, hand-washing countertops, toilets and other parts of your home with chlorine disinfectant. After wiping, take care to wash with water to avoid skin damage from disinfectant residues. Most patients with H. pylori infection have no symptoms or mild symptoms. If you have abdominal distension, abdominal pain, heartburn, belching, or bad taste in the mouth, you can do a C13 breath test or other tests to clarify the presence of H. pylori infection.