You can learn more at curiositystream.com/smart Don’t miss our next video! SUBSCRIBE! ►► bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ **We said 30 days free, but CuriosityStream is feeling extra generous and is giving our viewers the first 60 days free!!** Do you remember having a cold in 5th grade? Or the flu a couple years ago? Your immune system does. Our bodies hold many levels of immune defense.Physical barriers like skin, the innate immune system, and our body’s most powerful defender, the adaptive immune system. Millions of B cells and T cells and antibodies are constantly on patrol for germs and antigen invaders. As scientists learn more about how this system works and how to engineer it, could we ever actually be immune to everything? Special thanks to Dr. James Crowe (Vanderbilt University) www.crowelab.com/ ----------- FOLLOW US: Merch: store.dftba.com/collections/its-okay-to-be-smart Facebook: www.facebook.com/itsokaytobesmart Twitter:@DrJoeHanson @okaytobesmart Tumblr: www.itsokaytobesmart.com Instagram: @DrJoeHanson ----------- It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D. Director: Joe Nicolosi Writer: Sarah Keartes Creative Director: David Schulte Editor/animator: Karl Boettcher and Derek Borsheim Producer: Stephanie Noone and Amanda Fox Produced by PBS Digital Studios Music via APM Stock images from Shutterstock www.shutterstock.com

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