New research suggests that cold weather may actually affect the human body's immune response, making us more susceptible to colds, flu, and other upper respiratory infections. Dr. Benjamin Bleier, a sinus specialist at Mass Eye and Ear and a senior author of the study, joins John Yang to discuss its findings.

Originally released by NewsHour Productions LLC, 2023. Streaming video file encoded with permission for digital streaming by Infobase on May 31, 2023.