Public health experts are urging vigilance amid recent reports of severe bird flu cases in two North American patients.
The CDC says the risk of bird flu to the general public is low, but public health experts say they are worried the virus could mutate and become more transmissible.
No particular strain appears to be dominating at this time, but Budd warned its too early in the season to know how good a match the flu vaccine will end up being in combating the virus.
Stanford University researchers have developed a way to make the seasonal flu vaccine stronger against more strains, potentially including those that cause bird flu, the university said this ...