Photo Gallery: Swine Flu Gathers Steam 06/15/2009
 It is thought to have started in Mexico, but now, the H1N1 virus has become a...
REUTERS

It is thought to have started in Mexico, but now, the H1N1 virus has become a worldwide problem. Here, a woman and her son in Cairo wear facemasks to protect themselves against H1N1, also referred to as swine flu. Twenty-three cases have been reported in Egypt.