As scientists link oral bacteria to heart disease and cognitive decline, a push is under way to treat the mouth as a source of bodywide inflammation. Researchers are identifying the biological clues ...

The cities with the best quality of life have high scores on U.S. News’ Quality of Life Index. It measures how satisfied residents are with their daily lives, and takes into account factors like crime ...

Tetralogy of Fallot (TOF) is a combination of four congenital (present at birth) heart defects that affect babies. The defects occur at the same time and change the way blood flows through the heart ...