A cytokine storm is the systemic expression of a healthy and vigorous immune system resulting in the release of more than 150 inflammatory mediators (cytokines, oxygen free radicals, and coagulation factors). Both pro-inflammatory cytokines (such as Tumor Necrosis Factor-alpha, InterLeukin-1, and InterLeukin-6) and anti-inflammatory cytokines (such as interleukin 10, and interleukin 1 receptor antagonist) are elevated in the serum, and the fierce and often lethal interplay of these cytokines is referred to as a "Cytokine Storm". The primary contributors to the cytokine storm are TNF-a (Tumor Necrosis Factor-alpha) and IL-6 (Interleukin-6). The cytokine storm is an inappropriate (exaggerated) immune response that is caused by rapidly proliferating and highly activated T-cells or natural killer (NK) cells. These cells are themselves activated by infected macrophages. The cytokine storm must be treated and suppressed or lethality can result.Acute respiratory viral infection (especially from the H5N1 subtype influenza virus) results in a cytokine storm effecting the lungs, and subsequent damage to alveoli and lung tissue results in the lethality seen in more severe flu viral infections, especially those fatalities among young healthy adults. (Refer: cytokinestorm.com)
