People wear surgical masks to help prevent being infected with the swine flu as they ride the subway on April 29 2009 in Mexico City Mexico Reports...
{"Image ImageDescription": "MEXICO CITY - APRIL 29:  People wear surgical masks, to help prevent being infected with the swine flu, as they ride the subway on April 29, 2009 in Mexico City, Mexico. Reports indicate that most people confirmed with the new swine flu were infected in Mexico, where the number of suspected swine flu deaths has surpassed 150.  (Photo by Joe Raedle/Getty Images)", "Image Copyright": "2009 Getty Images"}