Critical Case of COVID-19 A 42 year old male patient presented to ED with two day history of fever and mild shortness of breath. No cough, no sore throat, no runny nose, no myalgia, no anosmia/hyposmia, no nausea or vomiting, no Abdo pain and no diarrhoea. He has no past medical history, not on any medications and is an Ex-Smoker. On examinations, he had high-grade fever and O2 Saturation of 91-92 on room air. Chest examinations revealed bibasal fine crepitations. Normal findings on CVS and abdominal examinations. Chest X-Ray show Cannon ball opacities in both lung fields. ABG shows T1RF. Basic Blood tests show Lymphocytopenia, raised inflammatory markers and stage 1 AKI. Patient was initially admitted to the ward but rapidly deteriorated and developed Haemoptysis and Severe Shortness of breath. CT CAP with contrast shows Classic COVID-19 infection with CT severe score. No other abnormalities in abdomen or pelvis. Nose and Throat swab tests are positive for COVID-19 four times. Full immunology, Rheumatology and Virology screen are all negative. Blood cultures did not show growth of any bacteria. How would you treat this patient?