According to journal Circulation Research findings ,Covid-19 is not a respiratory illness, as widely accepted, but a vascular one. The S protein of the virus, the spike that forms the crown, attacks the receptor ACE2, damaging the mitocondrias that generate the energy of the cells, thus damaging the endothelium, which lines the blood vessel. This is something that has already been observed, but what wasn’t previously known is the exact mechanism and role of the S protein. The effects on the respiratory system are a consequence of the inflammation of the vascular tissue in the lungs. Is covid-19 a vascular disease or respiratory?