In a breakthrough for influenza research, scientists have discovered immune cells that can recognize influenza (flu) viruses even as they mutate, raising hopes for a longer-lasting vaccine and a ...

In 1918, a strain of influenza known as Spanish flu caused a global pandemic, spreading rapidly and killing indiscriminately.

Add Yahoo as a preferred source to see more of our stories on Google. Although researchers continue to debate the exact location where the pandemic began, there is no credible evidence that anything ...