There's a "reset" that happens when we sleep. Your body releases natural melatonin that helps to reduce inflammation and the body goes through a process of autophagy, where the body "cleans out" waste, chemical buildup and excess lipids and plaques. By replenishing our energy stores with quality restorative sleep every day, our bodies can maintain a strong immune response against infections or other illnesses throughout the day.

Research suggests that good quality sleep can boost your body's ability to make antibodies which help ward off infections by attacking viruses and bacteria before they can cause harm or sickness.
Quality sleep also increases your ability to make cytokines which help fight infection as well as disease-causing pathogens. Sleep serves as an important purpose in boosting overall immunity levels within our bodies as well as helping us recover from illness faster if we do become sick.