Who can be damaged by Helicobacter pylori (H. pylori) infection? Infection is facilitated by a low standard of living and neglect of personal hygiene rules. People who live in dormitories, boarding schools, orphanages, as well as medical workers are ill most often. In third world countries, the disease is registered more often than in developed countries. It is worth noting that in the civilized countries of the world, in recent years, cases of the disease among a fairly well-off population have been documented.