Covid-19 hyperinflammation and post-Covid-19 illness may be rooted in mast cell activation syndrome
Another mystery about the Covid-19 pandemic is why the infection is mildly symptomatic or even asymptomatic in the majority of those who are infected but is severely symptomatic, often life-threatening, in a sizeable minority. In other words, what causes the immune system to so catastrophically suddenly overreact in certain Covid-19 patients while remaining properly regulated in the majority?