Today's Video

Science Behind The News: Allergies

Seasonal Allergies affect more than 40 million Americans each year. Plant biologist Dr. Kristina Stinson of Harvard University explains how allergies affect the body, and why warmer weather could lead to longer, more severe allergy seasons. "Science Behind the News" is produced in partnership with NBC Learn.

Provided by the National Science Foundation & NBC Learn
Runtime: 4:18