RSV, and norovirus are spreading at high levels in the U.S., causing overlapping symptoms like fever, fatigue, and nausea.

Alone and in combination with other lower respiratory tract disease signs and symptoms, dyspnea is the best predictor of severe RSV outcomes.

A virus rapidly spreading in China is also circulating in the United States, causing concern among health experts.

In the throes of winter's yearly round of respiratory virus outbreaks, it pays to remember what Grandma told you.