The trending term is just a new name for an existing illness known as "walking pneumonia," and experts say it's not worth "alarm bells ringing" Getty White spots appear on lungs during a chest X-ray.

Pneumonia is a common lung infection that can make breathing difficult and, in some cases, become life-threatening. It happens when the air sacs in the lungs fill with fluid or pus. Each year, about ...

"Pneumonia is often on both sides, not always, but the more lobes that are involved, the more lung tissue that's involved, ...

Pneumonia is an infection of the lung that causes the air sacs within the lungs to fill with fluid and pus. This can impact the body’s ability to take in oxygen, making it difficult to breathe. The ...

Pneumonia is a lung infection that can lead to serious complications in children. The illness may present differently in children than it does in adults. Pneumonia is an infection of the lungs caused ...