Researchers found that missing a single night of sleep can quickly affect key parts of the immune system. The study found important immune cells became overactive after sleep loss. Researchers say ...

When it comes to sleep, traditional advice has focused on the number of hours a person sleeps. But for older adults, the quality of sleep may affect cognitive performance the following day regardless ...

(CNN) — Do you get enough shut-eye? We know a good night’s sleep is essential for health, yet many do not consistently get enough of it. About 1 in 3 American adults do not regularly get recommended ...