Cases of Middle Eastern Respiratory Syndrome, or MERS, are on the rise in Saudi Arabia. That's prompting concern among public health officials that the MERS virus has become more virulent.
Copyright 2014 NPR
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Cases of Middle Eastern Respiratory Syndrome, or MERS, are on the rise in Saudi Arabia. That's prompting concern among public health officials that the MERS virus has become more virulent.
Copyright 2014 NPR