“A modest amount of sleep loss (restricting the time allowed for sleep to 4 hours for one night) reduced natural killer (NK) cell activity to an average of 72%,

“A modest amount of sleep loss (restricting the time allowed for sleep to 4 hours for one night) reduced natural killer (NK) cell activity to an average of 72%, compared with NK cell activity in participants who had a full night's sleep” [1] In other words even one night of sleep deprivation significantly impairs your immune system. See also, “Sleep is your superpower” https://ed.ted.com/lessons/BVciktYZ https://ed.ted.com/lessons/BVciktYZ [1] https://www.cdc.gov/niosh/work-hour-training-for-nurses/longhours/mod2/05.html https://www.cdc.gov/niosh/work-hour-training-for-nurses/long...