Thumb Suckers and Nail Biters May Develop Fewer Allergies

Thumb sucking and nail biting worries parents, but now new research shows that children with those bad habits may develop fewer allergies later in life.
By PERRI KLASS, M.D. from NYT Health http://ift.tt/29G5ywp
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Allergies, Children and Childhood, Hygiene and Cleanliness, Immune System
Source The New York Times
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