Last year, we saw the rise of a mysterious polio-like illness affecting dozens of children around the U.S., while the work of a Chinese scientist led to serious ethical questions about gene editing. Medical breakthroughs like health devices you can wear and 3-D printing show the increasing power of technology in healthcare. Dr. Tara Narula joins "CBS This Morning" for a look at the medical stories that will affect our lives in 2019.

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