NPR's Tavis Smiley talks to health commentator Dr. Ian Smith about whether genetic and environmental factors play key roles in why people suffer from asthma.
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KVCR is a service of the San Bernardino Community College District.
San Bernardino Community College District does not discriminate on the basis of age, color, creed, religion, disability, marital status, veteran status, national origin, race, sex, sexual orientation, gender identity or gender expression.
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