This is insightful science being applied here and will prove to be a major factor in understanding what COVID-19 does to cause respiratory distress and fatality. It is not the whole story with regard to fatal outcomes as there are multiorgan involvements and this will also hit people in their weakest link, so to speak, but the idea this is a typical pneumonia is in fact incorrect. This is a different kind of etiology because the point of attack is not on the linings of the alveoli through an inflammatory response to viral release by infected cells alone, although that is happening as well. A major factor here is the direct interaction of the virus with the hemoglobin molecule to make it inefficient in carrying oxygen to the tissues. That competition is in some cases deadly and is reflected in the mortality statistics as a major causal sequence of events.