Doctors are struggling to contain an outbreak of the deadly MERs virus in the Middle East.
In just the past weekend, 26 new cases were reported.
MERS cases spike to 339 in Saudi Arabia
MERS, which stands for Middle Eastern Respiratory Syndrome is similar to Sars or Severe acute respiratory syndrome, which causes acute respiratory illness, shortness of breath, and in severe, cases kidney failure.
It's sickened more than 330 people in Saudia Arabia alone - killing nearly a third of them.
Dr. Sanjay Gupta is OutFront with the latest.