A Fox News report indicates that short naps may be a “powerful countermeasure to sleep debt” and can boost one’s immune system.

Michael Grandner, a sleep researcher at the University of Pennsylvania who was not involved in the study, said the immune findings were somewhat contradictory to the existing literature.

“But these are complicated processes, and studies like these, that examine what happens during partial recovery, (help) us understand all of the ways that sleep is important for health and functioning,” Grandner told Reuters Health by email.

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