CHICAGO: Authorities in Mexico announced three more swine flu deaths and the United States and Canada one more death each as the world's largest vaccine maker signed a deal with the United States to produce a H1N1 flu vaccine.

The World Health Organization (WHO) says at least 46 countries have confirmed more than 12,950 swine flu cases. The Mexican death toll now stands at 83, and Canada's is two. The US death is the 12th in the country.

The tiny nation of Bahrain, meanwhile, reported yesterday that a 20-year-old student had come down with mild H1N1 flu - the first case in a Gulf Arab country. Puerto Rico and the Czech Republic both reported their cases on Monday.