You can continue to breastfeed after being infected with H. pylori, and breastfeeding is not contagious to infants. Failure to intervene promptly after infection with H. pylori can lead to chronic gastritis, peptic ulcers, and even stomach cancer. The disease is contagious and can be spread through oral-oral and fecal-oral transmission. However, it is not transmitted to infants through mother-to-child transmission, so breastfeeding is safe. Infection can occur through contact with saliva, vomit, or feces of an infected person in daily life, and can also be triggered by mouth-to-mouth feeding or intimate contact such as kissing with an infected person. Therefore, H. pylori infected people should avoid mouth-to-mouth feeding or kissing babies directly on the lips when feeding babies and young children to avoid infection.