H. pylori infection is not contagious when people speak in close proximity. H. pylori is transmitted through the gastrointestinal tract, with the main route of transmission being the mouth-to-mouth route. The oral route refers to eating food or eating utensils contaminated with saliva containing H. pylori, or mouth-to-mouth feeding of H. pylori infected people to other people, kissing other people, and so on. H. pylori is not transmitted through the respiratory tract, and talking in close proximity to a person infected with H. pylori is generally not contagious. H. pylori is more likely to be contagious, so you should pay attention to the prevention of H. pylori in your daily life. When eating in a group, share meals and chopsticks, and sterilize utensils regularly. If any of your family members are infected with H. pylori, it is important to share meals and eliminate mouth-to-mouth feeding. The main symptoms of H. pylori infection are acid reflux, heartburn, and gastric discomfort. If you suspect H. pylori infection, you can go to the hospital to take a C13 or C14 breath test. If H. pylori infection exists, it should be treated with full dosage and full course of anti-H. pylori therapy under the guidance of professional doctors, avoiding self-medication and stopping the medication by oneself.