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Differences between allergies, colds and sinus infections

| Sinus problems affect about 31 million Americans, and lead to around 16 million doctor visits per year. It can be tough to know if you're suffering from a sinus infection, allergies or a cold, especially due to high pollen counts this spring. Dr. Lisa Liberatore, a sinus specialist at Lenox Hill Hospital in New York, joins "CBS This Morning" with some tips.