This cold and flu season, you may be looking for clues you're getting better anywhere you can find them, even in the color of ...

When a white blood cell finds a germ, it latches onto it. Then it changes its shape to surround the germ. You can imagine the ...

My eyeballs hurt. I can’t remember the last time I was sick enough to have ouchy eyeballs. I am not quite to the point of having my hair hurt, but I was in that neighborhood earlier today. It’s ...

If your mucus is gray or black... …you likely inhaled dark-colored particles, like smoke from a fire or heavy exhaust.

A giant cat mural has been painted by a street artist in Sheffield city centre. The black-and-white image of a malevolent ...

Normal mucus often looks clear or white for most people, experts say. But mucus changes color, depending on the individual’s environment, in response to various germs and more, he adds.

ROME (AP) — Pope Francis suffered two new acute respiratory crises Monday and was put back on noninvasive mechanical ...

ROME and LONDON -- Pope Francis suffered two episodes of "acute respiratory failure" on Monday, the Vatican said. The ...