Tell the following statements True or False. 1. Food allergy may lead to death. 2. Allergic problems now are less than those in the past. 3. An allergic problem appears when the immune system fighting substances in the environment. 4. Better food-labelling helps allergy sufferers to choose proper food. 5. Allergic problems seldom happen on children. 6. Environmental changes like less exposure to microbes contribute to the increase in allergies. 7. Environmental pollution has no effect to immune system.