https://blogs.mercola.com:443/sites/vitalvotes/archive/2004/02/18/US-Experts-Struggle-with-Next-Years-Flu-Vaccine-.aspxU.S. vaccine experts meeting to formulate next winter's influenza vaccine said they had trouble deciding how well last year's formula worked. Various studies show the vaccine had effectiveness ranging from none at all to 60 percent. This is because UenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)