‘Tis the season for sniffles. Millions of Americans suffer from allergies, seasonal and otherwise. For this week’s "Please Explain," Dr. Clifford Bassett, the founder and medical director of Allergy and Asthma Care of New York, explains what an allergy is (and isn’t) and identifies key triggers - from nuts to gluten to the nickel commonly used in cell phones. He also covers the best medical and non-medical options for treatment. Dr. Bassett is the author of The New Allergy Solution: Supercharge Resistance, Slash Medication, Stop Suffering. The segment is guest hosted by Kai Wright.