The strain of bird flu is distinct from what has previously been found in dairy cattle. The finding means the virus has again spilled over from birds to cows, and it raises some worrying questions.

This new version, known as D1.1, was confirmed in Nevada cattle on Friday, according to USDA. It was detected in milk ...

At least four cattle herds in Nevada have tested positive for a strain of H5N1 bird flu never before seen in cows, state ...

A version of the avian influenza virus different from the one rampaging through herds since last spring has been detected in ...

RSV, respiratory syncytial virus, usually peaks in December and January while infecting the nose, throat and lungs, usually ...

A deadly virus closely related to a family of infections with mortality rates approaching 75 percent has made it to North ...