Blood flow problems within the lungs could be driving long COVID in some children, according to scans using an advanced form of MRI. Children and teens with long COVID appear to have significantly ...

Coughing up blood — a symptom known as hemoptysis — can be a sign of several different conditions. Many of these conditions can be serious, and some even life threatening. One of the conditions in ...

Thrombosis and embolism are both blood clots that reduce or block blood flow inside your blood vessels. They’re two different yet serious conditions. Here’s a look at the differences and similarities.

Researchers from UC San Francisco have discovered blood stem cells in the lungs, disrupting a decades-old belief that new blood cells were only made in the bone marrow. Conventionally it was thought ...