Blood clots in the lung may be a major cause of COVID-19 deaths
Even though death from this infection has been relatively low in India and is <1% in Tamil Nadu, given the very large number of people infected, significant numbers continue to die. What is its cause? Unlike what would be expected in a viral infection in the lungs, it is not the pneumonia itself, like in most previous influenza outbreaks, but rather surprisingly it is early and progressive clotting of blood in the lungs (pulmonary thrombosis) which impairs blood supply and gas exchange leading to respiratory failure.
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