This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page. Embed Code Restart Playing WATCH MORE VIDEOS FROM THIS EPISODE > Physician Dr. Ian Smith answers kids’ questions about how bacteria gets in the body, why they feel light-headed when they see blood, and why kids lose their baby teeth! Find out the answers! Why Reading Is Great for Your Health! ShareTweet
