WHO : In a background briefing with reporters on Tuesday , two senior administration officials said the vaccine , which is still in clinical trials , would require two shots . Swine flu deaths up ##ped in recent days to 1,154 in total worldwide . WHO : flu spreads in 6 weeks as far as most viruses spread in 6 months . U.S. plans to release nearly 160 M Americans ahead of the ` ` flu season '' GlaxoSmithKline has signed deals to provide 291 million doses of vaccine this year .
WHO : Swine flu deaths up ##ped in recent days to 1,154 in total worldwide . WHO : flu spreads in 6 weeks as far as most viruses spread in 6 months . U.S. plans to release nearly 160 M Americans ahead of the ` ` flu season '' GlaxoSmithKline has signed deals to provide 291 million doses of vaccine this year .