9Weakened Immune System
Just like other organs and mechanisms in the body, our immune system often performs better when we get sufficient sleep. Thus, an extended period of sleep loss would weaken the immune system and reduce its defense against foreign invaders like those which cause the common flu and cold. That’s why people with sleep deprivation tend to be more susceptible when they are directly exposed to harmful bacteria, viruses, or other components in surrounding environments. [9]
