Flu vaccine urged amid rising human bird flu cases

As human cases of H5N1 bird flu rise, U.S. health officials announced a $5 million plan to provide seasonal flu vaccines to livestock workers. Thirteen cases have been reported since April, with nine poultry workers in Colorado infected. Officials warn of potential genetic exchanges between human and avian flu viruses, which could lead to new pandemic threats. The vaccination program targets states affected by H5N1 outbreaks.