Americans are weathering the worst flu season in years, as a number of other respiratory illnesses circulate too, such as COVID-19, RSV and the common cold. A telltale sign you’re getting sick is ...

How a rare type of bacteria infected and ultimately blinded Nancy Montz's left eye was a head-scratcher for Dr. Morgan Morelli, a physician who specializes in infectious diseases. The Ohio woman had ...

When you're sick you'll often produce more phlegm, and might notice it's thicker or a different color: white, green, yellow or maybe even brown. We all produce mucus, even when healthy. Mucus is a ...