At the same time, the virus provokes an extreme immune overreaction known as a cytokine storm, in which signaling molecules called cytokines summon a ferocious assault on the lungs by immune cells.

• 除此之外，病毒同时还会刺激免疫系统过度反应，引发所谓的细胞素风暴（cytokinestorm），细胞素是免疫系统中的讯号分子，能够召来免疫细胞，猛烈攻击肺部。