CDC urges states and cities to keep flu surveillance at peak levels due to bird influenza threat

The CDC urged continued peak-season flu surveillance throughout the summer due to concerns about the potential human-to-human spread of H5N1 bird flu, mostly consisting of outbreaks among domestic dairy cattle. There has been extensive testing of this influenza virus, and subtyping was recommended to detect any cases of H5N1, which, if undetected, could pose a risk for a pandemic.