Reserve soldiers wearing face masks to guard against the H1N1 flu virus take part in a reserve forces training at a military training field in Seoul November 4, 2009. South Korea on Tuesday raised its flu alert status to the highest "red" level to prepare for a possible national emergency caused by the rapid spread of Influenza A, Yonhap News Agency reported. Reuters Pictures logo Reuters Pictures 27 months ago

Reserve soldiers wearing face masks to guard against the H1N1 flu virus take part in a reserve forces training at a military training field in Seoul November 4, 2009. South Korea on Tuesday raised its flu alert status to the highest "red" level to prepare for a possible national emergency caused by the rapid spread of Influenza A, Yonhap News Agency reported.