精选优质文档-倾情为你奉上The outbreak of swine flu that was first deteccted in Mexico was declared a global epidemic on june 11,2009. It is the first wotldwide cpidemic_1_by the World Health Organization in41years.The heightened alert _2_an emergency meeting with flu experts in Geneva that assembled after a sharp pise in cases in Australia.and rising _3_in Britain ,japan,Chile and elsewhere.Bur the epiemic is “_4_”in severity. According to Margaret Chan. The organizations director gen
