Cytokine Release Syndrome (CRS) Epidemiology Forecast to 2030 - ResearchAndMarkets.com ResearchAndMarkets.com's offering. This report delivers an in-depth understanding of the Cytokine Release Syndrome (CRS), historical and forecasted epidemiology as well as the Cytokine Release Syndrome trends in the United States, EU5 (Germany, France, Italy, Spain, and United Kingdom) and Japan. Cytokine release syndrome (CRS) is a systemic inflammatory response that can be triggered by a variety of factors such as infections and certain drugs causing pathologic over-activation of T cells, leading to hypersecretion of cytokines by T cells and other immune cell types. The symptoms of CRS typically occur within 30-120 min after the infusion has been initiated, and typically the risk is greater during the first infusion. After CAR T-cell therapy, the onset of CRS symptoms seems to be dependent on the administered dose of the active agent of the proliferation kinetics of adoptively transferred cells and ranges from a few minutes up to 14 days but usually occurs within the first week.