NEW : 99 cases confirmed in Mexico , up from 30 earlier cases . Some government offices , private business in Mexico to close from May 3 to 4 . The World Health Organization on Wednesday raised its pandemic alert to 5 , its second-highest level , warning of widespread human infection from the swine flu outbreak that originated in Mexico . Researchers conducting complete genetic sequencing of the new virus . World Health Organizations reports 148 cases in 9 countries .
NEW : 99 cases confirmed in Mexico , up from 30 earlier cases . Some government offices , private business in Mexico to close from May 3 to 4 . Researchers conducting complete genetic sequencing of the new virus . World Health Organizations reports 148 cases in 9 countries .