Workers put white sheets up to prevent photography as two hotel guests wait to try and retrieve thir luggage from the the Metro Park Hotel in Hong Kong on May 2, 2009 where the first H1N1 case was recorded. Hong Kong officials were making frantic efforts May 2 to track down anyone who had contact with a Mexican who tested positive for swine flu, with the government calling it a "critical moment." TOPSHOTS AFP PHOTO/ Mike CLARKE (Photo credit should read MIKE CLARKE/AFP/Getty Images)