Measles is Back. How Worried Should We Be?

We haven’t talked much about measles since it was declared eliminated in the United States in 2000. But measles is one of the most contagious viruses on the planet, and lower vaccination rates have given it a chance to spread—just like we’re seeing in West Texas. Dr. Sanjay Gupta traveled there to find out how the outbreak started, what’s being done to contain it, and how the community is coping. 

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