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 > An alarming surge of measles outbreaks across the U.S. has health officials on heightened alert. Learn the signs and symptoms of the highly contagious respiratory disease — and the best way to stop the spread of infection. ShareTweet