Moms and sleep researchers alike have stressed the importance of solid shuteye for years, especially when it comes to fighting off the common cold. Their stance is a sensible one—skimping on sleep weakens the body’s natural defense system, leaving it more vulnerable to viruses. But the connection relied largely on self-reported, subjective surveys—until now. For the first time, a team of scientists reports that they have locked down the link experimentally, showing that sleep-deprived individuals are more than four times more likely to catch a cold than those who are well-rested.
“It’s very nice to see an experiment looking at sleep as an important regulator for specific antiviral immune responses,” says Michael Irwin, a psychoneuroimmunologist at University of California (UC), Los Angeles, who is not involved with the study. “In this particular case, there’s a hard clinical outcome showing [sleep deprivation] and susceptibility to the common cold.”