The Cold War: Boosting Your Immune System Would Do A World Of Harm Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Vitamin C supplements allegedly boost the human immune system ( Wutthichai / Shutterstock.com ) Produced by Arwa Gunja Hosted by Todd Zwillich Produced by PRI and WNYC