New Mexico, Texas and Nebraska are among the states with the highest number of people showing flu-like symptoms.

It's an unusual winter for respiratory illnesses. The flu is peaking twice: once in early January and again in February.

This article will help you to understand the early symptoms of Japanese influenza and how it can lead to pneumonia.

The U.S. winter virus season is in full force, and by one measure is the most intense in 15 years.