Thrombotic Stroke

The platelet activation by free hemoglobin was attractive as a building block for an argument that cell-free hemoglobin was behind the Covid toes and livedo reticularis that some people with Covid-19 seem to get.  The thought was that vasoconstriction caused the former and blood clots caused the latter.  That idea seems to be grinding to a halt. 

But something is going on with blood clots.  

Young and middle-aged people, barely sick 

with Covid-19, are dying of strokes