NEW : 81 deaths in Mexico `` likely linked '' to swine flu . NEW : A potentially deadly new strain of the swine flu virus cropped up in more places in the United States and Mexico on Saturday , in what the World Health Organization called `` a public health emergency of international concern . '' 80 deaths in Mexico " probably related " to H1N1 virus. Two cases confirmed in Kansas ; more suspected in New York . Mutated form concerns World Health Organization .
NEW : 81 deaths in Mexico `` likely linked '' to swine flu . NEW : 80 deaths in Mexico " probably related " to H1N1 virus. Two cases confirmed in Kansas ; more suspected in New York . Mutated form concerns World Health Organization .