Can sildenafil treat COVID-19?

This is a case report. A 37 year old foreign female patient fell into a coma after being infected with COVID-19 for 28 days. As part of an experimental treatment plan, the hospital doctors began to inject her with a large dose of Viagra (sildenafil). After that, the patient's condition was miraculously improved and finally recovered. This is because sildenafil can dilate the arteries in the lungs, making it easier for blood to flow to organs, increasing oxygen levels in critically ill patients, thereby improving acute respiratory distress syndrome in severely ill patients, avoiding lung failure and endangering life.