Add Yahoo as a preferred source to see more of our stories on Google. "The flu," or seasonal influenza, is caused by influenza viruses, like those pictured above. | Credit: CAVALLINI ...

Last flu season left health experts shocked and worried. Nearly 200 children died from the flu, and here’s the heartbreaking truth most of them could have been saved by a simple vaccination. Dr. Mark ...

The flu is a contagious viral infection of the respiratory system that affects the nose, throat and lungs. It is caused by influenza viruses. Symptoms of mild flu infections can resemble those of the ...

Influenza levels in the United States are the highest they've been in 15 years as winter weather persists and the second wave of the virus causes more and more infections, according to the Centers for ...

NEW YORK (WABC) -- Flu season is not over yet, but recent studies show improvement. According to the Center for Disease Control, the percentage of pneumonia and influenza-related deaths this past week ...

The seasonal flu shot is a yearly vaccine administered to protect against the flu, or influenza. Here are the facts and side ...