Cytokines refer to compounds from the immune system, some of which are involved with the level of sleepiness.
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Cytokines refer to the chemicals released by the immune system that attack infections and communicate with the brain to elicit anti-illness behaviors. Cytokines are chemical messengers secreted by cells in the immune system, forming a communication link between the nervous and immune systems. Cytokines are compounds from the immune system, some of which are involved with the level of sleepiness.