A Rohinyga boy from Myanmar reacts as he receives vaccinations against measles and tetanus from Indonesian health department personnel at the newly set up confinement area in Bayeun, Aceh province on May 22, 2015 after more than 400 Rohingya migrants from Myanmar and Bangladesh were rescued by Indonesian fishermen off the waters of the province on May 20. The widespread persecution of the impoverished community in Rakhine state is one of the primary causes for the current regional exodus, alongside growing numbers trying to escape poverty in neighbouring Bangladesh.  AFP PHOTO / ROMEO GACAD        (Photo credit should read ROMEO GACAD/AFP/Getty Images)
A Rohinyga boy from Myanmar reacts as he receives vaccinations against measles and tetanus from Indonesian health department personnel at the newly set up confinement area in Bayeun, Aceh province on May 22, 2015 after more than 400 Rohingya migrants from Myanmar and Bangladesh were rescued by Indonesian fishermen off the waters of the province on May 20. The widespread persecution of the impoverished community in Rakhine state is one of the primary causes for the current regional exodus, alongside growing numbers trying to escape poverty in neighbouring Bangladesh.  AFP PHOTO / ROMEO GACAD        (Photo credit should read ROMEO GACAD/AFP/Getty Images)

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    How measles was eliminated and then came back

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How measles was eliminated and then came back

The measles, mumps and rubella vaccine is 97% effective, so why are we seeing so many outbreaks? CNN's Chief Medical Correspondent Dr. Sanjay Gupta explains why the contagious disease is spreading.

How measles was eliminated and then came back

The measles, mumps and rubella vaccine is 97% effective, so why are we seeing so many outbreaks? CNN's Chief Medical Correspondent Dr. Sanjay Gupta explains why the contagious disease is spreading.