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A comment on Fewer Allergies: A Possible Upside of Thumb Sucking and Nail Biting. Parent comment

Re:Fewer Allergies: A Possible Upside of Thumb Sucking and N... by ridgeguy on Wednesday July 20, 2016 @10:00PM (#12134084)
You beat me to it!

Nasal secretions should be good sources of airborne pathogens. Different pathogen profile from fingernails, etc. Wider challenges for a developing immune system.

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