Old conventional wisdom: It is primarily a lung disease, like ARDS
New conventional wisdom: It is a cardiovascular disease that clobbers the arteries & veins in the lungs first. You don't need a spare lung as much as you need really healthy arteries & veins.
(source, MedCram) https://x.com/mistersql/status/1241703673505423360
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May 3, 2020