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Kids Born in America Have Higher Allergy Risks

American-born children have a higher risk of developing allergies to foods or airborne particles like pollen or dust, a new study has found.  Though researchers have not identified a definitive reason for the findings, The New York Times reports that the risk is elevated across a number of variables:

After adjusting for age, race, sex, ethnicity and other variables, the scientists found that children born outside the United States were 48 percent less likely to suffer from allergic diseases like asthma, eczema, hay fever and food allergies. The researchers reported their findings in an online article Monday in JAMA Pediatrics.

Children with American-born parents had higher rates of allergies than children with foreign-born parents, and having two foreign-born parents reduced the risk for allergy even more than having one.

Just living in the United States appeared to increase the risk — foreign-born children who lived in the United States for 10 years or more were more than three times as likely to have allergies as those who lived here for two years or less.

Image: Child with hay fever, via Shutterstock