Does New Swine Flu Virus Kill By Causing a Cytokine Storm?

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The swine flu outbreak that began in Mexico and continues to spread around the globe may be particularly dangerous for young, otherwise healthy adults because it contains genetic components of the H5N1 avian influenza virus, which can induce a “cytokine storm,” in which a patient’s hyper-activated immune system causes potentially fatal damage to the lungs. Research studies and review articles exploring the regulation of cytokine responses in the lung and how infection-related dysregulation can cause a cytokine storm have been published in Viral Immunology, a peer-reviewed journal published by Mary Ann Liebert Inc.

A cytokine storm occurs when the body’s immune system over-reacts to an intruder, such as a virus, by producing high levels of cytokines, which are signaling chemicals that help mobilize immune cells capable of removing infectious agents from the body. When too many cytokines are produced, they can stimulate an inflammatory response in which the accumulation of immune cells and fluid at the site of infection may prevent affected tissues and organs such as the lungs from functioning properly and may even cause death

Comment: Much is yet to be learnt. Further clarification of the H1N1 virus’s effect on immune parameters have yet to be understood, but caution suggests that assisting prevention and limiting promotion of proinflammatory cytokines in the event of infection are still the recommended approaches. See swine flu what you need to know.

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