From what I’ve been able to piece together, the virus invades the lungs and ultimately leads to pneumonia. Pneumonia kills by causing a severe inflammation in the alveoli, and this inflammation fills the alveoli with so much liquid that oxygen can no longer traverse the alveoli and enter the blood vessels, so the person in effect suffocates.
What I’ve come across that’s interesting here is that vitamin D has a protective effect against upper respiratory infections. Don’t know how this happens or why, but I wonder whether getting adequate amounts of vitamin D might mitigate a coronavirus infection in the lungs to the point where the person does not have a pneumonia phase. Just a thought.
Would be interesting to know just how vitamin D fights against and mitigates upper respiratory illnesses.