Cases of a wretched stomach bug are surging in parts of the United States this winter, according to government data.

As a severe outbreak of norovirus, also known as the stomach flu, spreads across the United States, doctors have shared advice with Newsweek on what to look out for about the illness. More Charles D.

Fluoridated water is lauded as one of the greatest public health achievements of the 20th century. Yet, more Americans are ...