Short-term sleep deprivation is not particularly severe for, say, two to three days. Resulting in small problems like reflexes, immune response, and behavioral changes. But if it goes longer, into five or six days, things get worse, fast. As in real cognitive issues and problems with the brain being able to process information correctly. Not just externally but internally, too. As in the management of vital internal systems. If lack of sleep becomes extreme, it can lead to organ failure and even death.”
