COVID-19(26) Protein(13) IL6(13) Spike protein(13) host response(11) SARS-CoV-2(11) Endothelial cell(11) viral spike protein(10) severe COVID-19(10) expression(10) endocytosed(10) spike protein.(10) the spike protein(9) fatal COVID-19(9) TNFα(9) SARS-CoV2(9) spike(9) Viral protein(8) pseudovirion(7) pseudovirions(7) caspase(7) eosin(7) tissue(7) Hematoxylin and eosin(7) Brain(7) Proteins(7) caspase 3(7) Viral RNA(7) endothelial(7) hematoxylin(7)