FILE- In this Wednesday, April 16, 2014 photo, Passengers are seen on a thermal scanner as they arrive at Manila's International Airport in Paranaque, south of Manila, Philippines. One expert says recent outbreaks of MERS in Saudi Arabia and the United Arab Emirates that led to more than 20 infections, many among health-care workers, “have put us into uncharted territory.” (AP Photo/Aaron Favila, File)
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