Cows infected by lethal bird flu strain never before seen in the animal showing respiratory symptoms, Nevada says
At least four cattle herds in Nevada have tested positive for a strain of H5N1 bird flu never before seen in cows, state ...
Bird flu is now considered 'widespread' in Massachusetts as outbreaks spread, officials warn
Bird flu is now believed to be widespread in Massachusetts and is likely present even in places where there has not been a ...