H5N4 avian influenza detected in US for first time this season
The case comes as North America and Europe continue to suffer from what is being called the worst bird flu season on record.
Chickens await vaccination against bird flu at the settlement Peredovoi 100 km (62 miles) from the Russia's southern city of Stavropol, March 11, 2006.(photo credit: EDUARD KORNIYENKO/REUTERS)ByTZVI JOFFRE
