“release syndrome”

: a sometimes life-threatening, systemic inflammatory condition that results from an aggressive immune response involving over-activation of immune cells (such as T cells in response to immunotherapy or infection) which release excessive cytokines in the body in an uncontrolled fashion and that is characterized especially by fever, fatigue, headache, rash, or muscle or joint pain and may progress to more serious symptoms including hypotension, increased heart rate, capillary leakage, edema, hypoxia, multiple organ failure, and sometimes death : the syndrome resulting from a cytokine storm : cytokine storm syndrome —abbreviation CRS