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 ...

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 ...

Snot is made up of water, proteins, antibodies, and dissolved salts, explains Jonathan Parsons, M.D., a professor in the Department of Internal Medicine at The Ohio State University Wexner Medical ...

It's unfortunate but true: It's totally normal for adults to get colds multiple times a year. And each of those colds will tend to follow a similar three-stage pattern, says Dr. Shiv Sudhakar, ...

Mucus is a thin, slippery fluid that lines the nose, throat, and other passages to trap dust and germs. Phlegm is a thicker type of mucus produced in the lungs to catch and remove harmful particles ...

This germ fighting goo gives useful clues about your immune system and more! We explore the science behind your snot. There's a lot of chemistry going on in your phlegm. This germ-fighting goo ...