Medical Discovery News
Common knowledge and previous studies generally agree that children who grow up in the inner city and are exposed to mouse allergens, roach allergens and air pollutants are more likely to develop asthma and allergies. But a recent study adds a new twist — children exposed to these substances in their first year of life actually had lower rates of asthma and allergies. However, if these allergens were first encountered after age one, this protective effect did not exist.
Another study parallels this one, concluding that children growing up on farms also have lower allergy and asthma rates. Scientists argue that farm children are regularly exposed to microbes and allergens at an early age, leading to this same protective effect.
Asthma is the most common chronic condition among children. One in five Americans, or 60 million people, has asthma and allergies. In the industrialized world, allergic diseases have been on the rise for more than 50 years. Worldwide, 40-50 percent of school-age children are sensitive to one or more common allergens. Continue reading