April 17, 2020 — Just one of the great mysteries of the new coronavirus is why it leads to only mild disease in most individuals, but turns deadly for some others. In a lot of scenarios, it would seem the worst damage may be driven by a deranged immune response to the infection, somewhat than the virus by itself.

In a lot of of the sickest individuals with COVID-19, their blood is teeming with significant concentrations of immune method proteins identified as cytokines.

Experts feel these cytokines are proof of an immune response identified as a cytokine storm, where the