Katia Hetter

A survey of 46 countries found many smokers know cigarettes cause lung cancer but are less aware of the risks of heart attacks, strokes and secondhand smoke.

Smoking cigarettes doesn’t just cause lung cancer. The toxic smoke affects nearly every organ in the body — yet some of its most serious consequences may be less widely recognized.

(CNN) — Going without sleep makes it harder to concentrate and learn new information. And for people who work overnight or face an occasional period of severe sleep loss, getting enough rest may not always be possible in the moment.

Exercise and naps may protect memory after sleep deprivation in different ways. A doctor explains what these results from a recent study mean.

(CNN) — Going without sleep makes it harder to concentrate and learn new information. And for people who work overnight or face an occasional period of severe sleep loss, getting

(CNN) — Sudden unexpected infant death claimed the lives of about 3,400 babies in the United States in 2024. Despite decades of public health efforts to promote safer sleep, these deaths remain a major cause of mortality during infancy.

Sudden unexpected infant death claimed the lives of about 3,400 babies in the United States in 2024. Despite decades of public health efforts to promote safer sleep, these deaths remain a major cause of mortality during infancy.

(CNN) — Sudden unexpected infant death claimed the lives of about 3,400 babies in the United States in 2024. Despite decades of public health efforts to promote safer sleep, these

A small study found 20 minutes of aerobic exercise and a 90-minute nap similarly improved memory after severe sleep loss, but neither replaces needed sleep.

(CNN) — The death of a 42-year-old man on a roller coaster at Six Flags Over Georgia this week has raised important questions about amusement park safety.