Microbiology All of the following are true about Helicobacter pylori except – A About 50% of world population affected B 85% of population is affected in some developing contries C All childrens in developing countries have immunity by five years of age D Infection is common in low socioeconomic status 💡 Explanation All of the following are true about Helicobacter pylori except - ✓ Correct Answer: C. All childrens in developing countries have immunity by five years of age