We read with interest the paper by Lee I et al i .[1] in which they describe widespread microvascular damage marked by endothelial cell damage/activation, microthrombi, complement activation, and disruption of the blood-brain barrier (BBB). Endothelial cell damage is the central part of COVID-19 and a mouse model induced by injection of the S1 subunit of the spike protein. [Extracted from the article]